Biomedical beta-titanium alloy material and preparation method

The invention relates to a biomedical beta-titanium alloy material and a preparation method, and belongs to the technical field of preparation of titanium alloy materials with high niobium content. The alloy comprises the following components in percentage by mass: 30-40 percent of Nb, 5-15 percent of Zr, 1-10 percent of Sn, 0.1 and 0.3 percent of O and the balance of Ti. The titanium alloy has high comprehensive performance, and the strength and the elastic modulus of the alloy can be modulated and controlled by different heat treatment processes; the elastic modulus E of the alloy is 40-68GPa; the yield strength sigma 0.2 is 580-800MPa; the tensile strength sigma b is 750-1120MPa; the elongation ratio epsilon is 12-48 percent; and the section shrinking percentage is 36-65 percent. The titanium alloy does not contain toxic elements, has excellent corrosion resistance, biocompatibility and cold treating performance, and can perform cold rolling in a large deformation amount. The titanium alloy is wide in use, so that the titanium alloy can be used for manufacturing tissue recovery or replacement materials of a human body of mouth rehabilitation, artificial bone, joint prosthesis and the like, and also can be used for manufacturing machines in sports and industry.