Patent ID: 8425567

Claim:
A spinal fixation rod made of titanium alloy for fixing a plurality of spinal fixation screws embedded and fixed in vertebrae of a human body, the titanium alloy comprising: Nb content of 25 to 35 percent by weight, Ta content of such that the Nb content+0.8×Ta content ranges from 36 to 45 percent by weight, Zr content of 3 to 6 percent by weight, and the remainder is Ti and unavoidable impurities, excluding vanadium, wherein the rod is cylindrically shaped, wherein the rod has a diameter adjusted to 4 to 7 mm, wherein the rod has a sufficient length for coupling with the spinal fixation screws, and wherein the rod is produced by: subjecting a cylindrical rod made of the titanium alloy to a swaging processing of cross-sectional reduction rate of at least 90%, and aging the swaged rod by heating at a temperature of 600 to 800K for 43.2 ks to 604.8 ks.