The stoichiometric Al2O3 center dot TiO2 composite oxide was synthesized using solvothermal method in a benzyl alcohol oleyl amine system. The effect of temperature was subsequently examined on structure and physico-chemical properties of the as-synthesized product. The structure was systematically characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), nuclear magnetic resonance (NMR). The textural properties were measured by isothermal physical adsorption and surface acidity amount and acidity type was identified by pyridine adsorption-Fourier transformation infrared (FTIR). The results show the as-synthesized product is made of a layered structure with interlayer distance of 2 nm. Calcinations at 400 degrees C-600 degrees C could easily make the layered structure transform into disordered mesoporous structure. The mesoporous materials are based on gamma-Al2O3 structure, in which anatase TiO2 dissolves. The mesoporous Al2O3 center dot TiO2 materials have very high surface area above 500 m(2)/g and very narrow pore size distribution in the range of 3-4 nm. The surface acidity amount is also very high. The increasing of calcinations temperature causes surface area and acidity amount to decrease linearly. Calcinations at 700 degrees C could induce phase separation just to begin and calcinations at 800 degrees C had led to the formation of rutile TiO2 and gamma-Al2O3. Consequentially, the mesoporous structure of the sample calcined at 800 degrees C collapsed and surface area and surface acidity amount became quite low. (C) 2014 Elsevier B.V. All rights reserved.