Nitinol plates have many advantages, such as low density, high strength, good toughness, good biocompatibility, low toxicity, low elastic modulus, good corrosion resistance, low X ray absorption rate, which is becoming more and more important in medical metal materials. Titanium and its alloys can be used in human hard tissue repair and replacement, or for cardiovascular and soft tissue repair and artificial organs, is a kind of special functional materials closely related to human life and health. At present, has become the artificial joint, artificial bone, broken bones is fixed, spine correction rod, intramedullary nail, artificial heart valve, dental implants, skull replace or repair the product of choice for metal materials