Nitinol tube is an intermetallic compound consisting of approximately equal atomic ratios (50 percent nickel and 50 percent titanium), with a density of 6.45g/cm3, and a melting point of 1240-1310℃.

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

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.

The 20th century is the era of mechatronics. Sensor integrated circuit drive is the most typical mechanical and electronic control system, but it is complex and huge.

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.

In 1932, Swedish Holland observed the "memory" effect for the first time in the gold cadmium alloy, that is, once the shape of the alloy is changed, once heated to a certain jump temperature, it can magically change back to the original shape.