チタン部材の曲げ加工方法および曲げ加工具

摘要

A bending tool includes a fine uneven portion with fine asperities having a maximum surface roughness of 3 m or more and 25 m or less on at least part of a portion that is in contact with a titanium member, and a fluorine resin film formed on the fine uneven portion so that only a part of plural top portions included in the fine uneven portion is exposed. The fluorine resin film is tightly attached to a surface of the fine uneven portion.