| 摘要 |
PURPOSE:To obtain a Ti or Ti-alloy sheet minimal in occurrence of oil canning and having superior formability, by repeating cold rolling and annealing so as to finish into a proper sheet thickness and also by specifying respective contents of Fe, O, N, and H. CONSTITUTION:The Ti or Ti-alloy sheet which is finished into 0.2-2.0mm thickness by the repetition of cold rolling and annealing has a composition in which >=300ppm Fe is contained and (Fe+O+N+H) is regulated to <=1,500ppm and further, preferably, Fe/(Fe+O+N+H) is regulated to >=about 0.5. In this way, the Ti or Ti-alloy material free from the occurrence of wavy surface discontinuity called oil canning at the time of forming, having superior formability, and applicable to building materials can be obtained.
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