Magnetic Properties of Titanium

Titanium is not magnetic, mainly because its atomic arrangement structure cannot produce free electrons in the magnetic field. As a result, it does not have ferromagnetic properties like iron or steel. Titanium only has paramagnetic properties.

Is pure titanium magnetic?

Pure titanium usually has a titanium content of 99% or more. Pure titanium does not have spontaneous magnetization properties, usually if the external magnetic field is very strong, then pure titanium will induce the magnetic field and produce a little weak magnetism, and if pure titanium leaves the magnetic field area, there is no magnetism at all, so pure titanium has paramagnetic properties.

The paramagnetic properties of pure titanium are caused by the different arrangements of the crystal structure inside pure titanium. Among them α-Ti crystal structure is more conducive to the generation of paramagnetic properties.

Is titanium alloy magnetic?

A common titanium alloy is Ti-6Al-4V alloy, which is Grade 5 titanium. It also has paramagnetic properties.

The magnetic properties of titanium alloys are mainly related to the added alloy components, and when aluminum, tin, zirconium, vanadium, molybdenum and other components are added, titanium alloys still reflect paramagnetic properties. However, when iron, cobalt, nickel and other components are added, ferromagnetic properties will appear, which also depends on the type and quantity of added components.

In general, the magnetic susceptibility of titanium alloys is higher than that of pure titanium.

What are the factors that affect the magnetic properties of titanium?

The purity of titanium

The purity of titanium is a weight factor that affects titanium’s magnetism. Pure titanium has low paramagnetic properties, and if it contains other alloying elements, the magnetic susceptibility will be higher.

The temperature of titanium

Titanium magnetism changes in different temperature environments. Titanium’s paramagnetic properties increases when the temperature gets lower, and its magnetic susceptibility decreases as the temperature increases. (According to Curie’s law).

Alloying elements of titanium alloys

If metals such as iron and nickel are added, it may be ferromagnetic.

If elements such as aluminum, vanadium, niobium, zirconium, chromium, tin, etc. are added, titanium will still exhibit paramagnetic. For example, TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V), TB2, Ti-15V-3Cr-3Sn-3Al alloys, etc. are all non-magnetic, with only faint paramagnetic.

Magnetic properties of other metals

Common magnetic metals

Iron

Iron has an atomic number of 26 and is ferromagnetic and is often used as the main material for making magnets. You can be firmly sucked in by this post. It is mostly used in manufacturing, construction, etc.

Steel

Steel is an alloy material, which is synthesized from iron and carbon. The magnetism of steel is determined by the type of alloy, for example, carbon steel is ferromagnetic, but the magnetism of stainless steel is judged based on its internal chemical composition and crystal structure. Common 304 and 316 stainless steels are non-magnetic.

Nickel

Nickel has an atomic number of 28 and is ferromagnetic. The magnetic properties of nickel are often used in magnetic alloys, electromagnetic shielding facilities, magnetic telescopic materials, etc.

Common non-magnetic metals

Gold

Gold has an atomic number of 79 in the periodic table and is a precious metal. It is completely non-magnetic. It is often used as a financial reserve, jewelry decoration, etc.

Copper

Copper has an atomic number of 29 and is also a non-magnetic material. Its electrical conductivity and corrosion resistance are excellent, and it has a wide range of applications in wires and pipes.

Aluminum

Aluminum is also not magnetic, it has excellent electrical and thermal conductivity, and is widely used in life.

Brass

Brass is composed of copper and zinc and is not magnetic. It is widely used in hardware construction, musical instrument manufacturing, power electronics and other fields.

What applications can titanium’s magnetic properties be applied to?

Medical device manufacturing and biomaterials field

Titanium is often used to make surgical implants because it is not affected during MRI scans. This also mainly takes advantage of titanium’s non-magnetic properties and excellent biocompatibility.

Medical implants and surgical instruments are typically made using CP-Ti or Gr5 titanium alloys (also known as Ti-AL-4V alloys). Titanium products such as titanium plates, titanium rods, titanium tubes, and titanium meshs are usually used.

Aerospace & Precision Instrument Manufacturing

Because titanium is very light in mass and has high strength. Therefore, it is often used to make aerospace components, and the non-magnetic characteristics of titanium are very friendly to some avionics. It is commonly used in aero engine components, engine components, spacecraft connections, and titanium fasteners.

Electromagnetic functional devices

Some electronic devices need to be used in environments with very strong magnetic fields, and it is just right to use the non-magnetic properties of titanium to manufacture some electronic devices. For example, magnetic resonance imaging (MRI) machines commonly used in medical applications and sophisticated navigation systems used in daily life, as well as titanium sensors and magnetometers.

Marine engineering field

Navy submarines use the non-magnetic properties of titanium to detect magnetic anomalies to locate submarines. In addition, hull fittings and sensors made of titanium can also receive external magnetic signals.

Titanium anodes and fittings can form a cathodic protection system where the associated electric field is not disturbed.

Conclusion

Titanium is indeed a non-magnetic material that only exhibits weak paramagnetic in magnetic environments. Titanium’s non-magnetic properties are also widely used in various fields. We have been on titanium manufacturing for decades, if about titanium other questions, contact us freely.

FAQ

6.1will a magnet stick to titanium？

Titanium is not attracted by magnets because titanium has no ferromagnetic properties.

6.2What effect does it have on the magnetism of titanium when the temperature rises?

When the outside temperature rises, it has no effect on pure titanium.

But for titanium alloys, increasing temperature reduces paramagnetic effects.

6.3 is titanium ferromagnetic？

Titanium does not have ferromagnetic properties. There is only a faint paramagnetic property.

6.4 is titanium conductive？

Titanium can conduct electricity, but its conductivity is very poor. Especially after adding alloy components, the conductivity will be further reduced. So it is not an ideal electrode material.