S）和松弛速率系數(shù)（CR）來描述Ti-6.5Al-2Zr-1Mo-1V合金的松弛特性，有利于制定殘余應力消減工藝。根據(jù)Norton和Arrhenius方程計算了應力指數(shù)。通過應力指數(shù)和顯微組織分析，闡明了應力松弛機理。在不同初始應力下，500 ℃時，位錯的攀移和擴散主導了應力松弛過程；550 ℃時，位錯滑移在應力松弛過程中起主要作用；600 ℃時，位錯滑移、邊界滑移和晶粒旋轉(zhuǎn)控制著松弛過程。;Stress relaxation tests were performed on Ti-6.5Al-2Zr-1Mo-1V titanium alloys with different initial stresses at 500, 550, and 600 °C. Based on the classical Maxwell exponential decay function, the stress relaxation limit was obtained. The relaxation stability coefficient (CS) and relaxation rate coefficient (CR) were proposed to describe the relaxation characteristics and to further guide the residual stress reduction. The stress exponent was calculated according to Norton and Arrhenius equations. Both the stress exponent and microstructure were analyzed to illustrate the stress relaxation mechanism. Under different initial stresses, the dislocation climb and diffusion dominate the stress relaxation procedure at 500 °C; the dislocation slip plays a major role in stress relaxation at 550 °C; the dislocation slip, boundary slip, and grain rotation control the stress relaxation process at 600 °C."/>