Due to excellent cold formability

TB5 titanium alloy sheet is apply to forming moderately complicated spare parts of metal sheet for space flight and aviation

but it has such problems as poor setting

big spring-back after forming. In the paper

the evolution rules of the deformation behavior

microstructures and formabilities in the bending deformation were investigated for TB5 titanium alloy sheets.The results show that with the increasing of bending angles and decreasing of the bend radius of the sheet

the spring-back angle is positive correlation with the grain size and horizontal distanceand-vertical ratio of the grains. With the increasing of bending angles and decreasing of the bend radius of the sheet

the hardness at the center of deformation is positive correlation with the grain size

negative correlation with horizontal- vertical ratio of the grains at the center of deformation.