TITANIUM MATERIAL FOR USE IN HOT ROLLING

摘要

This titanium material 1 for use in hot rolling comprises a base material 1b comprising an industrial pure titanium or titanium alloy, and a surface layer 1a formed on at least one rolled surface of the base material 1b and having a chemical composition different from that of the base material 1b, wherein surface layers 1a have a thickness of 2.0-20.0 mm and make up no more than 40% of the total thickness per side and, when the content of elements included in the surface layer 1a are measured at multiple points, the relation between the average value CAVE of the increased content from the base material 1b and the increased content C0 from the base material 1b at each of the multiple measurement points: |CAVE - C0| / CAVE × 100 is less than or equal to 40%. The chemical composition of the aforementioned surface layer contains, in mass%, B: 0.1-3.0% as the increased content from the base material. This titanium material 1 for hot rolling has prescribed neutron blocking properties despite being inexpensive.