研究了Ti-35V-15Cr(A)和Ti-25V-15Cr(B)两种合金, 在不同温度下暴露100 h的热稳定性能.结果表明, 随热暴露温度升高, 合金性能恶化.600 ℃热暴露, B合金性能恶化的根本原因是表面氧化, A合金则是由于表面氧化与组织变化的共同作用.高V含量的A合金中α相比B合金中的α相更易聚集于晶界.在450～540 ℃两合金中α相的析出及长大, 尤其是晶界α相的析出和长大, 是合金性能恶化并发生沿晶断裂的主要原因.
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