| 摘要 |
PROBLEM TO BE SOLVED: To provide a Ti alloy less expensive than the presently used Ti-0.15Pd alloy and having excellent corrosion resistance and also to provide a corrosion resistant Ti alloy having cold workability (press workability) equal or superior to that of the Ti-0.15Pd alloy and further a corrosion resistant Ti alloy excellent also in hydrogen absorption resistance. SOLUTION: The Ti alloy excellent in corrosion resistance can be obtained by providing a composition consisting of, by mass (the same applies to the following), 0.020-0.050% Pd, one or more platinum group elements other than Pd in an amount one-third (in mass ratio) the amount of Pd or more, and the balance permissible components and Ti. To obtain the corrosion resistant Ti alloy excellent in cold formability, it is desirable to provide a composition consisting of 0.020-0.050% Pd, 0.01-0.03% Ir and/or Pt, <=0.05% Fe, <=0.05% O, and the balance permissible elements and Ti. Further, in addition to cold formability and corrosion resistance, hydrogen absorption resistance can also be imparted by regulating the amount of Pd to <=0.030%.
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