Medical high-strength titanium alloy wire and preparation method thereof

The invention provides a medical high-strength titanium alloy wire and a preparation method thereof and relates to component control of a Ti-6Al-4V titanium alloy wire having high strength and good cold molding characteristic and a preparation method thereof. The component control of the Ti-6Al-4V titanium alloy wire is as follows: based on weight percent, 6.0%-6.3% of main element Al, 4.2%-4.5% of V, 0.13-0.15% of interstitial element O and 0.08%-0.12% of Fe. The alloy obtained according to the component control is subjected to smelting, cogging and forging, multiple heating numbers of upsetting and forging, large-deformation rolling, temperature-control hot drawing, stress relief annealing, electric heating straightening and grinding processes so as to prepare the high-strength titanium alloy wire. The Ti-6Al-4V titanium alloy can obtain high strength (tensile strength of more than or equal to 1200Mpa and elongation A of more than or equal to 8%) and excellent plasticity, and can be applied to a medical Kirschner wire fixing system.