| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-strength α-β type titanium alloy which is superior in hot workability, and besides, shows superior intermittent machinability when being worked by an end mill, a milling cutter, or the like. Ž<P>SOLUTION: The titanium alloy includes, by mass%, 0.06 to 0.13% C, 3.0 to 8.5% Al, further one or more elements of 5.0% or less V, 3.0% or less Cr, less than 2.5% Fe, 5.0% or less Mo, 5.0% or less Ni, 5.0% or less Nb and 5.0% or less Ta in a total amount of 2.0 to 10.0% and the balance Ti with unavoidable impurities. An average area ratio of TiC precipitates in a titanium alloy matrix is 0.5% or less and a mean equivalent circle diameter of the TiC precipitates is 1 μm or less by average. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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