Because titanium is an active element, in the moment of exposure to air can form a thin layer of TiO2 oxide film on the surface of the material, this layer of oxide film inert degree is very high, can be limited to prevent further oxidation and corrosion, to ensure the good biocompatibility of titanium; in mechanical properties, titanium low density, high mechanical strength, elastic modulus and other medical metals are closer to bone tissue, which is titanium has a more ideal biomechanical compatibility, in addition it also has good mechanical processing properties, easy to process molding.