The present paper describes a complete identification and validation procedure of a damaged elastic-plastic law to determine the material parameters allowing accurate simulation of the micro-SPIF process. At first, tensile tests are initially carried out to propose the initial material behavior law (without damage) and the definition of the initial parameters for the identification procedure. Then, an inverse method based on the comparison between numerical and experimental micro-SPIF axial forming forces of a pyramidal shape is applied to calibrate the material behavior considering the damage effects. Finally, this law is validated by simulating the micro-SPIF process using the same pyramidal shape with a second forming strategy as well as the conical shape.