本发明提供一种改善钛带卷卷形的装置及其退火方法，装置包括箱体炉、分别设置在箱体炉两外侧的带有承重轴的基座、以及分布设置在箱体炉内壁的加热件；所述承重轴穿过侧壁设置于箱体炉内部，承重轴包括内轴以及设置在内轴外壁的冷却系统，承重轴外部还设置收涨径；操作时通过将钛带卷装卷、抽真空、加热、旋转，按一定要求加热及保温，随炉冷却，即获得卷形良好的钛带卷。本发明所得钛带卷卷形良好，退火自然展开后不平度≤1.2%。钛带卷通过裁切成板材可直接使用，无需后续的压矫、板材去应力退火等工序，经济利益极佳。 

The invention provides a device and an annealing method for improving the coil shape of a titanium strip coil. The device comprises a box furnace, pedestals arranged on the two outer sides of the boxfurnace and provided with load-bearing shafts, and heating elements distributed on the inner wall of the box furnace. The load-bearing shafts penetrate through the sidewall to be arranged inside the box furnace. Each load-bearing shaft comprises an inner shaft and a cooling system arranged on the outer wall of the inner shaft. A diameter expansion and shrinkage unit is further arranged outside each load-bearing shaft. During operation, the device conducts feeding, vacuum pumping, heating, rotating, heating and heat preservation according to the requirements, and furnace cooling on the titaniumstrip coil, and then the titanium strip coil with the good coil shape is obtained. The titanium strip coil obtained through the device and method has the good coil shape, and the unevenness of the titanium strip coil after annealing and natural spreading is less than or equal to 1.2%. The titanium strip coil is cut into boards which can be directly used without subsequent pressing and straightening, board stress relief annealing and other steps, and the economic benefits of the titanium strip coil are excellent.