A 2. 5 kW CO₂ laser,  a HVS-1000 Micro-hardness measuring instrument and an X-350A X-ray stress measuring instrument were adopted in the experiment where 0. 6mm-thickn sheet steel of TA2 was studied to evaluate the process parameters of bending with thermal stress induced by laser.  Bending angle was measured as the function of main processing parameters.  These processing parameters were arranged according to the theory of orthotropic experiment.  Distribution of residual stress on the surface and variation of micro-hardness on the cross section of samples were studied after forming.  The results show that these parameters bring different effects.  The number of passes ranks first,  followed by laser spot in terms of their effect on the bending angle,  with power of laser beam and scan speed being the last two factors.  Parameters of laser forming also have some influence on the distribution of residual stress on the surface of samples.  Certain regularity appears in the variation of micro-hardness on the cross section of samples.