| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of adopting a coil rolling process enabling continuous production and applicable to an Al-containingα+βTi alloy and further capable of providing a Ti alloy combining excellent workability with strength by means of subsequent annealing. SOLUTION: At the time of annealing a coil cold rolled sheet of Al-containingα+βTi alloy, annealing is performed while selecting the heating temperature at annealing among the temperatures avoiding the temperature region where a brittle hexagonal crystal appears, within the temperature range between the temperature at which work hardening at cold rolling is relaxed and Tβ. By this procedure, the elongation of the coil cold rolled Ti alloy sheet in T- direction can be improved.
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