The paper presents the characteristics of inelastic properties of the surface material
of laboratory specimens under monotonic deformation and fully reversed cyclic loading. The
comparative results are shown for calculating the values of the surface layer inelastic strains
determined based on the fractal parameterization method for statistically non-uniform surfaces of
the material for two states of the deformation-induced relief under identical conditions of elasto-plastic deformation in specimens. The kinetic characteristics of discrete strains in the material at the
stage of non-localized damaging are presented