Metastable beta type Zr-Mo-Ti hard tissue biomedical alloy and preparation method thereof

The invention discloses a metastable beta type Zr-Mo-Ti hard tissue biomedical alloy and a preparation method thereof. Raw materials used in the invention comprise, by weight, 11.5 to 12.5% of molybdenum and 0.1 to 11.0% of titanium, with the balance being zirconium sponge. The preparation method comprises the following steps: weighing the raw materials according to corresponding weight percentages; fully mixing the raw materials; melting the raw materials by using a non-consumable vacuum arc furnace; and carrying out cooling so as to obtain an alloy ingot with a uniform structure. The biomedical alloy provided by the invention has advantages same with the advantages of a traditional medical alloy, overcomes the problems of Young modulus and mismatching with the natural skeleton of a human body of the traditional medical alloy and is expected to overcome the problem of damage to the human body caused by mismatching of mechanical properties of a substitute material. According to the invention, molybdenum and titanium are used as alloying elements, solution strengthening is carried out on a zirconium matrix, compression strength of a zirconium alloy is effectively improved, and the content of titanium is adjusted to change compression strength, plasticity, Young modulus and the like of a zirconium alloy.