Abstract:In this paper, a new type of high-temperature titanium alloy Ti750s alloy with nearly α is selected as the experimental material. The plate is rolled from 11.5 mm to 1.5 mm by multi-fire rolling. The microstructure and texture evolution process during rolling deformation are studied. The results show that the microstructure of the 11.5 mm plate retains obvious deformation characteristics, the original β grains are seriously elongated, and a large number of flaky α phases are precipitated inside the grains. The plate presents a T-shaped texture in the {0001}//TD direction, with more 60 ° and 90 ° high-angle grain boundaries, and the internal dislocation density is low. After reversing rolling to 5.2 mm, a large number of twisted strip-like α phases appear in the microstructure, which are uniformly tilted to the TD direction, and the T texture disappears, and the B texture in the {0001} // ND direction appears. At this time, the {0001} axis of the α grain is evenly distributed in the pole diagram deviating from the ND about 20 ° direction, and the large angle grain boundary of the sheet is less, and the dislocation density is larger. After the second reversing rolling to 1.5 mm, the microstructure is mainly composed of deformed strip α grains, the grain size is small, and the B-type texture disappears, the T-type texture reappears, and the plate has almost no large angle grain boundary, and the dislocation density is large.