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In search for environmentally friendly lubricant additives, titanium 2 ethylhexanoate and tita nium oleate, which titanium compounds soluble in white oil, have been synthesized, as well as titanium diox ide nanoparticles modified with tetra (2 ethylhexyl)thiuram disulfide and di(2 ethylhexyl)thiophosphono disulfide. These titanium compounds have been characterized by elemental analysis, thermogravimetry, and IR spectroscopy. By means of the small angle X ray scattering technique, it has been found that the TiO 2 nanoparticles have a size of 1-10 nm. Evaluation of antiwear properties of titanium compounds on a ChS hMT 1 tribometer in a white oil solution shows that the decrease in wear scar diameter is 38-49% compared with the white oil. Analysis of the friction surfaces by atomic force microscopy and X ray microanalysis has shown a decrease in roughness of the friction surface caused by the presence of titanium atoms in the surface layers.