Tensile tests were conducted by keeping the true strain rate constant throughout deformation over wide ranges of strain rates (10(-3) - 5 x 10degrees/s) and temperatures (523-823 K). True stress-true strain curves were computer-simulated using a constitutive equation based on dislocation dynamics to generate important deformation parameters. A pronounced tensile stability takes place rather at an intermediate temperature (748 K) and a high strain rate (1 x 10degrees/s). Both strain-dependent stain rate sensitivity, tit and strain hardening parameter, gamma could be calculated by using the deformation parameters obtained from simulation as a function of strain, so that tensile stability can graphically be estimated, which coincides well with that visually observed from experiments.