The synthesis of nanosized particles of titanium oxides in a molten mixture of chlorides and nitrates of alkali metals has been carried out. The formed oxide powders were certified by X‑ray structural analysis, Raman spectroscopy, and scanning electron microscopy. The synthesis of titanium oxides of various modifications and compositions was performed at anodic polarization of high-purity titanium in a molten eutectic mixture of cesium and sodium chlorides containing 5 wt % sodium nitrate in a galvanostatic mode with a current density of 3.5 mA/cm2 in a temperature range of 540–700°C under an argon atmosphere. The phase composition of the oxidation products depends on the synthesis temperature, and the particle size is controlled by the specified density and temperature. It was found by X-ray diffraction analysis and Raman spectroscopy that the sample obtained at a synthesis temperature of 540°C is single-phase and consists of Cs1.36Ti6.64O16, and the samples that were synthesized at temperatures of 600 and 650°C form a TiO2 phase in mixed modifications anatase and rutile. The sample, which was obtained at a temperature of 700°C, consists of titanium dioxide TiO2 (in modification of rutile and brookite) and NaTi8O13. It was shown by scanning electron microscopy that with an increase of the synthesis temperature the particle size were decreased. The sample synthesized at a temperature of 540°C and annealed at a temperature of 200°C contains a mixture of nanosized and micro-sized particles of cesium trititanate (over 50 nm). A titanium dioxide sample synthesized at a temperature of 600°C has a particle size of 20 nm, and the samples synthesized at a temperature of 650 and 700°C have a particle size of 10–20 nm.