Different metals have different density, if you would like to use titanium, titanium density is an important parameter. Firstly comprehensive and accurate to know titanium density is a must lesson for learning titanium and you could learn more from our blog.
Titanium Density Overview
Most titanium density ≈4.51g/cm³ around 20°C. While temperature, pressure, processing process, and impurity element content that would all effect the density of titanium.
Test Method for Titanium Density
The density of titanium can usually be detected in two ways.
- Drainage method – suitable for irregularly shaped titanium products
First you need to prepare the following materials: an electronic scale (to be accurate to 0.01 grams), half a glass of cold water (about 4 ° C), a filament thread and a container that can completely submerge this titanium article.
Then you follow my steps:
The weight of the titanium product (expressed in m1) is first weighed using an electronic scale.
Step 2: Weigh the total weight of the container with cold water (labeled m2)
Step 3: tie the titanium product with a filament and hang it in water, be sure to ensure that the titanium product is completely submerged and cannot touch the inner wall of the container, and record the total weight of the container (marked as m3)
Step 4: calculate the volume: V=m3−m2 (because the density of water is 1g/cm3, its volume is the volume of titanium products).
If the final result is close to 4.51g/cm³, then it is likely to be a titanium product.
- Direct measurement method – suitable for titanium products with regular shapes
The materials you need to prepare include : an electronic scale, a ruler.
Then you follow my steps:
Step 1: Weigh the titanium product (expressed in m) using an electronic scale.
Step 2: Measure the size of the titanium product with a ruler and calculate its volume (expressed as V). For example, a right-angle prism with a volume V=length x width x height; Cylinder, volume V=πr2h (r refers to radius, h refers to height)
Step 3: Apply the density formula ρ=m/V to calculate the density of titanium products
If the final result is close to 4.51g/cm³, then it is likely to be a titanium product.
Main Factors That Affect Titanium Density
- Purity of titanium products
If the purity of the titanium product is higher, the density of the titanium will be closer to the theoretical value (about 4.51 g/cm³). If it is a titanium alloy product, because it contains impurity elements such as carbon, nitrogen, hydrogen, and oxygen, it will affect its density, but it will not change much.
- Chemical element composition
The density of titanium alloys will generally be less than 4.51g/cm³, which is: Because titanium alloy products contain other chemical elements, which affect the purity of titanium products, resulting in a smaller density. For example, titanium alloys containing elements such as aluminum and vanadium may have slight fluctuations in density, but overall their density differences will not be too large.
- Processing technology
Titanium processing methods can generally be divided into cold and hot working. Cold working may include cold rolling, cold drawing, and hot working may include forging, hot rolling, etc. These processes can cause lattice distortion within the atom, which can have a slight impact on the density of titanium.
Overall, titanium’s purity and chemical element composition have a slightly larger impact on density, while factors such as processing technology have a relatively small impact. In your practical application, the density of pure titanium remains stable at around 4.51g/cm³, while the density of titanium alloys will be slightly lower, which also depends on the case.
- Temperature
The density of titanium can vary slightly at different temperatures, as follows:
20 ℃: Most titanium density is about 4.51g/cm³.
882.5℃:The density of titanium may decrease to 4.35 g/cm³
900 ℃:The density of titanium may be about 4.32 g/cm³.
When temperature increases, the density of titanium will gradually decrease. This change is mainly due to the intensification of atomic thermal motion, increasing the distance between atoms, resulting in a decrease in the number of atoms per unit volume, and thus a decrease in density.
Different Titanium Density Between Different Titanium Grades
The density of different grades of titanium is mainly influenced by the content of alloying elements in its composition.
| Grade | Chemical Element Composition | Density (g/cm³) |
| Gr1, Gr2, Gr3, Gr4 | 99.6% titanium | 4.51 |
| Gr5 / TC4 | Ti-6Al-4V | 4.43 |
| Gr6/TA7 | Ti-5Al-2.5Sn | 4.46 |
| Gr9 | Ti-3Al-2.5V | 4.48 |
| Gr23 | Ti-6Al-4V ELI | ~4.43 |
| Beta C | Ti-3Al-8V-6Cr-4Mo-4Zr | ~4.71 |
| α+β | Ti6Al7Nb | ~4.52 – 4.55 |
| β | Ti13Nb13Zr | ~5.8 – 6.0 |
From the table, you can clearly see that the density of pure titanium has remained at 4.51 g/cm³, while the density of titanium alloys is consistently below 4.51 g/cm³. More obviously, Ti13Nb13Zr has the highest density.
Titanium Density VS Other Common Metals
| Metal name | Chemical symbol | Density(g/cm³) |
| Aluminum | Al | ~2.7 |
| Titanium | Ti | ~4.51 |
| Iron | Fe | ~7.87 |
| Copper | Cu | ~8.96 |
| Gold | Au | ~19.3 |
| Nickel | Ni | ~8.9 |
From the table, you can see that the density of titanium is relatively low, so the weight of titanium is very light.
Titanium Uses Because of Titanium Density
Due to titanium high strength to weight ratio , density is smaller than other metal with high strength, titanium is widely used in the following:
1) Aerospace: Such as titanium impellers, titanium blades, titanium engine casings, nozzles, and aerospace titanium fasteners in engines
2) Military industry: used for manufacturing equipment such as armored vehicles, warships (especially submarines), missiles, etc., while providing protection and controlling the total weight.
3) Automotive industry: Lightweight components such as exhaust systems, springs, connecting rods, etc., reduce vehicle weight, fuel consumption, and exhaust emissions. High performance racing cars: widely used in engines, suspension systems, etc., to enhance handling and acceleration performance.
4) Medical implants: artificial joints (hip, knee), bone plates, dental implants, surgical instruments, etc. Light titanium density does not increase weight burden on patients, meanwhile with good support.
5) High performance sports equipment: golf balls, tennis rackets, bicycle racks, hiking poles, etc., pursuing ultimate lightweight and high strength, which can reduce the burden of sports.
6) Daily life: eyeglass frames, watches, kitchenware, tableware, etc.
FAQ
8.1 At what temperature does the density of titanium decrease?
The density of titanium suddenly decreases when heated above 882.5°C. When pure titanium is heated from room temperature (alpha phase) to 882.5°C, a solid-state phase transition occurs from the alpha phase (close packed hexagonal) to the beta phase (body centered cubic). After the phase transition, the arrangement of atoms becomes “loose”, and the average distance between atoms increases, which leads to an increase in the total volume occupied by atoms, but the mass of the substance remains unchanged. According to the formula ρ=m/V, as the mass (m) remains constant and the volume (V) increases, the density (ρ) naturally decreases.
8.2 Is titanium the smallest dense metal?
Titanium is not the least dense among metals. In metals, lithium has a density of approximately 0.53g/cm³, making it the metal with the lowest density.
8.3 Which has a higher density, titanium or steel?
Typically, steel has a density of about 7.85 g/cm³, which is higher than titanium.
8.4 Compared with titanium and nickel, which one is denser?
Of course, nickel has a higher density, about 8.9 g/cm³, which is much higher than titanium.
8.5 What is grade 5 titanium density and grade 2 titanium density?
They are both around 4.51g/cm³.
8.6 What is titanium dioxide density and titanium nitride density?
Titanium dioxide density is around 4.23g/cm³, titanium nitride density is around 5.4g/cm³.
Conclusion
Overall, titanium has a medium density among all metals. However, due to factors such as temperature, pressure, Impurity elements, and processing technology, the density of titanium alloys undergoes small changes. The density of titanium makes it stand out among many metals, and if you want to use it in orthopedic instruments, medical implants, and aerospace fields, titanium is undoubtedly the best choice. If you would like to know exact titanium grade’s density, you could contact us freely.
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