The smartest metal ever
Nickel-titanium alloy is a shape memory alloy. Shape memory alloy is a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature.Why it reacts to the environment when the temperature changes?The secret is nitinol has two crystal structures ：martensite and austenite.
Martensite refers to its cold phase, while austenite refers to its hot phase,
When heated, the inner structure changes from Martensite to austenite, so we can see its deformation.It is ideal material for many applications,such as medical, electronic,auto industry etc.
