process for the production of titanium and titanium alloy with a fine gleichachsigen microstructure

摘要

According to the present invention, alpha titanium and titanium alloy materials having a fine equiaxed microstructure are produced. A titanium, alpha titanium alloy or ( alpha + beta ) titanium alloy material is hydrogenated in an amount of 0.02 to 2% by weight. If necessary, the hydrogenated material is subjected to pretreatment [i.e., heated above 700 DEG C ( beta transformation point)] and/or working (i.e., working at 450 to 950 DEG C, or temperatures above beta transformation point and below 1100 DEG C). The material is then aged at 10 to 530 DEG C or 10 to 700 DEG C (in the case of working at temperatures above beta transformation point), and finally dehydrogenated and recrystallized to prepared a material having a fine equiaxed microstructure.