①High specific strength. Titanium alloy has a low density and moderate strength, which can meet the strength requirements of bones, joints, surgical instruments and other medical devices. At the same time, titanium medical devices are relatively lightweight, which greatly reduces the load on the human body and provides high user comfort.
②Good mechanical compatibility. The elastic modulus of titanium and titanium alloys is far closer to human bones than stainless steel, cobalt-chromium alloys, etc. The elastic modulus can be reduced to 40-100 GPa, which can reduce the stress shielding effect of human bones on implants, and has a good match with human bones.
③Good corrosion resistance. There is a thin oxide film on the surface of the titanium alloy, which has good chemical stability and is corroded by antibody liquid, which is suitable for the use of various parts of the body.
④Biocompatibility, good health, non-toxic, non-allergenic.
⑤ Good processing and shapeability, suitable for making plates, rods, wires, nets, tubes, special-shaped parts, etc.
In addition, titanium alloy has low X-ray absorption rate, good X-ray visibility, and most of them are insensitive to magnetic fields, are not affected by electromagnetic fields and thunderstorms, and will not affect patients' X-ray and MRI examination; Titanium nickel alloy also has a unique shape memory function and superelasticity. Based on the above characteristics, titanium and titanium alloys have become biometal materials with a wide range of applications.
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