Process for preparing titanium and titanium alloy having fine acicular microstructure.

摘要

This present invention is charctrized in that a titanium material or an alpha or ( alpha + beta ) titanium alloy material hydrogenated in an amount of 0.02 to 2% by weight of hydrogen is heated to a temperature above the beta transformation point and below 1100 DEG C, is hot worked in that temperature range at a reduction of 30% or more, the hot working is terminated in a beta single phase temperature region, and cooling to 400 DEG C or less, and annealing in vacuum are then carried out, whereby titanium and titanium alloy materials having a fine acicular microstructure are obtained. (Fig. 1) <IMAGE>