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The hydrothermal synthesis of TiO2 (anatase) nanocrystals has been produced. The conditions of reproducible synthesis of anatase nanocrystals by thermal treatment of water solution of titanium isopropoxide and triethanolamine at T= 80-100°C by 48 h have been found. Phase composition of final product has been verified by TEM and XRD analysis. As it has been obtained, the dimensions of TiO2 particles varied in the range 10-100 nm with mean value of 45 nm.