中文摘要：

对固相烧结的WTi10合金在–196℃下进行了深冷处理。对合金的显微硬度、XRD物相、SEM及TEM形貌等进行了分析和表征。结果表明：深冷处理后,合金的组成依然为富钨相和富钛相;随深冷时间的增加,钨钛合金组织中富钛相所占面积比例先增大后减小,24 h深冷处理后组织中富钛相的比例与未处理试样的差别不大;合金的晶粒尺寸也呈现先增大后减小的变化趋势,24 h后晶粒尺寸最大减小了24.6%;晶粒尺寸分布更加均匀。深冷处理能显著提高WTi10合金的显微硬度和致密度,深冷处理24 h后合金的显微硬度大约是深冷前的2.5倍;深冷24 h后合金的择优取向由（110）变为（110）和（200）。

英文摘要：

W-10wt%Ti alloys prepared by solid state sintering were treated at –196 °C. The properties and microstructures of W-10wt%Ti alloys were analyzed comparatively by microhardness measurement, X-ray diffraction, SEM and TEM. The results show that after cryogenic treatment, W-10wt%Ti alloys are still composed of W-rich and Ti-rich solid solution. The content of Ti-rich phase increases and then decreases with prolonging the cryogenic time, but there is no obvious change for the Ti-rich phase in the sample with 24 h cryogenic treatment compared with the untreated sample. The alloy grain size also increases and then decreases, and it is reduced by 24.6% after 24 h cryogenic treatment, reaching the minimum; meanwhile, the grain sizes are uniformly distributed. Cryogenic treatment can significantly improve the microhardness and relative density of WTi10 alloy, and the hardness after 24 h cryogenic treatment is about 2.5 times higher than that of originality; the preferred orientation of the alloy cryogenic treated for 24 h is changed from（110） to（110） and（200）.