| 摘要 |
The present invention provides a sheet, a plate, a bar or a wire which is made of titanium and has a strength equal to, and a ductility higher than, those of a titanium material of JIS class 2 or 3 and, moreover, a low material anisotropy in a plate plane of a sheet or a plate, or in a sectional plane of a bar or a wire, and a method of producing the same. More specifically, the present invention is a sheet, a plate, a bar or a wire which is made of titanium and has high ductility and low material anisotropy in a plate plane of a sheet or a plate, or in a sectional plane of a bar or a wire, characterized by: containing, in mass, Fe at 0.15 to 0.5%, nitrogen at 0.015 to 0.04% and oxygen, with the balance consisting of titanium and unavoidable impurities; and when the Fe content is defined as [Fe], the nitrogen content as [N] and the oxygen content as [O], the oxygen equivalent value Q=[O]+2.77[N]+0.1[Fe] being 0.11 to 0.28, and a method of producing the sheet, plate, bar or wire, characterized in that all or a part of the amounts of Fe and nitrogen contained therein are supplied by adding Fe containing nitrogen when the material is melted.
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