The material of hip replacement used to be mostly stainless steel, but currently the vast majority of them are made of titanium alloy. Because stainless steel has one of the biggest weaknesses is that it is magnetic, always ring in the future when the security check, and can not do MRI and other related checks. Titanium alloy is not only good rigidity, good toughness, but also no magnetism, and with the human body combined very well, so the current use of titanium alloy as a material for hip replacement. There are also hip femoral head and acetabulum made of ceramic, which is more effective, not only non-magnetic, but also very good wear resistance and smoothness, but more expensive, so few people use it. Now there is no uniform standard for materials, there are domestic and imported. In the future, 3D printing will be needed, the patient’s femoral head is what kind, print out is what kind, the size is exactly the same, and the material is also titanium alloy. The difference between domestic and imported materials is not only the difference in price, but also the possible model is different. In the future, after the realization of 3D printing, where the bones are curved, how thick and thin, made out exactly the same. Materials will develop better and better, and will continue to research and improve in the process of clinical or practical application.