Soft X-ray absorption spectroscopy (Cu L and O K spectra ) was applied to identify changes in the charge states of copper ions in quasi-statically loaded (torsion under pressure) Cu2O. As was found from our X-ray diffraction and X-ray absorption experiments, an increase in the degree of deformation lead to a decrease in the areas of coherent scattering (sizes of nanograines), to partial amorphization of oxides, and to a slight increase in the concentration of Cu2+ ions on the surface of the Cu2O samples. No new phases were detected using X-ray diffraction measurements. The repeated measurements of the Cu L and O K spectra of the nanostructured Cu2O samples after two years showed significantly more intense signals at high photon energies, indicating the appearance of Cu2+ ions on the surface of nanostructured Cu2O, corresponding to the CuO phase. It was shown that two types of Cu2+ ions on the surface of Cu2O samples with different binding energies of Cu 2p electrons could be formed.