Abstract:Based on the macro characterization of micro-damage, macro damage variables of ductile metal in deformation process were characterized by various test methods. Six samples under different true strains were prepared by pre-tension deformation. And based on the result of compression test of different pre-deformed samples with micro compression tester (MCT-W501), ductile damage of metal was characterized by normalization indices, such as hardness, elastic modulus, toughness indicator and resistivity. The changing rules and physical meaning of the above damage variables were discussed. The research shows that the integration of the above damage variables and equivalent damage curve should be applied in order to reflect and to explain the real process of damage of ductile metal