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The reason why shape memory alloy has the ability of deformation recovery is the thermoelastic martensite transformation in the process of deformation.

Because of its unique shape memory function, it has the advantages of super elasticity, wear resistance and corrosion resistance, so it has been widely used in many fields.

After a certain heat treatment, the shape of Ni Ti alloy shape memory alloy will be restored automatically.

The spring is made of TiNi shape memory alloy wire, which uses the one-way memory effect of shape memory alloy.

Memory alloy, because it has more than one million times of recovery ability, many people call it "living alloy" precisely because memory alloy is a kind of "living alloy", using its shape change under a certain temperature, we can design various automatic control devices, its use is expanding.

Principle of memory alloy: it is generally believed that shape recovery memory will occur when the memory alloy changes from a complex diamond crystal structure to a simple cubic crystal structure.

In order to carry out the plan of the lunar surface antenna, it is necessary to use the space shuttle to transport the parabolic antenna with a large diameter to the moon.

Ni Ti alloy is a kind of shape memory alloy. Shape memory alloy is a special alloy which can automatically restore its plastic deformation to its original shape at a certain temperature.

In the shape memory alloy industry chain, the upstream is mainly titanium, copper, iron and other metal raw materials; because shape memory alloy has shape memory effect, super elasticity, high damping characteristics and resistance characteristics, it is difficult to be replaced by other materials.

On December 11, 2017, NASA released a kind of non pneumatic tire made of shape memory alloy, which is not only lighter, stronger and safer, but also can be used in various harsh terrain.