Аннотация:First-principles calculations of the electronic structure of γ-TiAl intermetallic are performed incomparison with pure Ti and Al. Interrelation between the crystal structure, elemental composition, andelectronic structure of γ-TiAl is discussed. The energies of inner electronic levels are found taking into account the excited state, which is characteristic of the X-ray photoelectron spectroscopy (XPS), and the chemical shifts of the main XPS lines of γ-TiAl with respect to the lines of pure Ti and Al are determined. The results agree with experimental data.