Titanium Materials is non-toxic, lightweight, strong and has excellent biocompatibility, making it a very desirable medical metal material for use as implants in the human body, among other things. At present, it is still the Ti-6Al-4v ELI alloy that is widely used in the medical field. However, the latter will precipitate a very small amount of vanadium and aluminium ions, reducing its cellular adaptability and may cause harm to the human body, this problem has long caused widespread concern in the medical community. As early as in the mid-1980s, the United States began to develop aluminium-free, vanadium-free, biocompatible titanium alloys for orthopaedic surgery. Japan, the United Kingdom and other countries have also done a lot of research work in this area and made some new progress. For example, Japan has developed a series of α+β titanium alloys with excellent biocompatibility, including Ti-15Zr-4Nb_4ta-0.2Pd, Ti-15Zr-4Nb-aTa-0.2Pd-0.20~0.05N, Ti-15Sn-4Nb-2Ta-0.2Pd and Ti-15Sn-4nb-2Ta-0.2Pd- 0.20, these alloys have better corrosion strength, fatigue strength and corrosion resistance than Ti-6Al-4v ELI. Compared with α + β titanium alloys, β titanium alloys have higher strength waterwise and better incisional properties and toughness, which are more suitable for implantation into the human body as implants. In the U.S., five β titanium alloys have been recommended for medical applications, namely, TMZFTM (TI-12Mo-^Zr-2Fe), Ti-13Nb-13Zr, Timetal 21SRx (TI-15Mo-2.5Nb-0.2Si), Tiadyne 1610 (Ti-16Nb-9.5Hf), and Ti-15Mo. It is estimated that in the near future, such titanium alloys with high strength watercourses, as well as better incision properties and toughness, will be more suitable for implantation into the human body than α+β titanium alloys. In the near future, such hut titanium alloys with high strength, low modulus of elasticity, and excellent formability and corrosion resistance are likely to replace Ti-6Al-4V ELI alloys, which are currently widely used in the medical field.
