Two series of mesoporous TiО2-Al2О3 mixed oxides with various Ti:Al atomic ratios and pure TiO2 and Al2O3 mesoporous oxides were prepared by means of coprecipitatlon method with followed calcination. Evolution of phase composition, morphology, microstructure, and texture properties was investigated with use of X-ray diffraction, scanning electron microscopy and low-temperature N2 physisorption. The effect of precipitator type on microstructure, textural properties and on photocatalyst activity of TiО2-Al2О3 mesoporous mixed oxides was observable.