Fibrillar Al2O3-TiO2 were obtained by a pH-swing method by varying the pH from 2 to 8, and repeating this range (e.g. a cycle) several times, in combination with different ways to incorporate titanium oxisulfate. Depending on the stage in which Ti-oxisulfate is added to the alumina, large anatase aggregates or very dispersed TiO2 domains were obtained on/in alumina nanofibers. Thus, when using a co-precipitation method in combination with pH-swing between pH 2 and 8, with six pH cycles, a high TiO2 dispersion can be obtained, as indicated by Raman spectroscopy and X-ray diffraction. On the other hand, when adding Ti-oxysulfate at the end of the pH-swing procedure, though alumina nanotibers were formed, anatase was predominantly located as large particles in the interfibrillar voids. Specific surface area and total pore volume of nanofibrillar Al2O3-TiO2 were around 300 m(2)/g and 1 cm(3)/g, respectively, after calcining at 500 degrees C. The highly disordered intertwined fibrils favored high pore volume values, even upon calcinations at 500 degrees C. (c) 2008 Published by Elsevier B.V.