用低频(0.5—1Hz)内耗法研究了 Ti-H(0.1—1.1wt-%H)合金的相变内耗。结果表明:(1)高氢钛合金(0.8—1.1wt-%)在升、降温过程中分别于325,225℃出现内耗峰,它们与 Ti-H 合金的共析相变有关。(2)低氢钛合金(0.12wt-%)的内耗峰在共析温度以下出现。(3)中等氢含量(0.44wt-%)的钛合金降温时的内耗峰可分解为双峰,与共析沉淀和氢化物从过饱和α相中的沉淀有关。借助于差热分析实验,讨论了上述内耗峰产生的可能机制。 The internal friction loss of Ti-H (0.1-1.1wt-% H) alloy was studied by low frequency (0.5-1Hz) internal friction method. The results show that: (1) The internal friction peaks of high hydrogen titanium alloy (0.8-1.1wt-%) appear at 325 and 225 ℃ respectively during the rising and falling temperatures, which are related to the eutectoid transformation of Ti-H alloy. (2) The internal friction peak of low hydrogen titanium alloy (0.12 wt-%) appears below the eutectoid temperature. (3) The internal friction peak of the titanium alloy with medium hydrogen content (0.44 wt-%) can be decomposed into bimodal peaks, which is related to the precipitation of eutectoid precipitation and hydride from the supersaturated α phase. With the help of differential thermal analysis experiment, the possible mechanism of the above internal friction peak was discussed.