Within the Beattie spectroellipsometric method, we measured the ellipsometric parameters of thin Ti films deposited onto glass substrates by magnetron sputteung in argon atmosphere. Measurements were carried out at five angles of incidence with light from the visible and ultraviolet ranges of the spectrum. Using the Airy recurrent formulas, we solved the inverse problem of ellipsometry for a three-layer model of films. The model includes nine unknown quantities - three thicknesses of layers and six optical constants, namely: the refractive and absorption indices of all these layers. The results obtained show that the upper layer being in contact with air consists of titanium oxide ot the TiO2 type, the second layer is made of pure metallic titanium, and, finally, the third layer adjoining the glass substrate is also oxide TiO2. It is worth noting that the optical constants of the second layer are practically identical to those of massive Ti. The calculations of the film thicknesses and optical constants by using the one-layer model gave the values significantly different from the optical constants of massive titanium. In addition, the studies of both the electric conductance of the prepared Ti films and morphology of their surface with an atomic force microscope were carried out.

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