用扫描电镜(SEM)研究了α+β钛合金中的界面相,确认在α+β、α+β转、片状α+片间β组织中存在着界面相。在α+β过组织中未见界面相。界面相的宽度随着α相量的增多和β相量的减少而增大。同时还证实了α+β相界面上的界面相是试样在慢冷过程中相比例发生变化以及合金元素重新分布时形成的。 The interfacial phase in α + β titanium alloy was investigated by scanning electron microscopy (SEM), and it was confirmed that there existed interfacial phase in α + β, α + β turn, sheet α + β sheet. There is no interphase in α + β over-organization. The width of interface phase increases with the increase of α phase and the decrease of β phase. At the same time, it was also confirmed that the interface phase on the α + β phase interface is formed when the phase ratio changes and the alloying elements redistribute in the slow cooling process.