The slow (8-10 days) interaction of TiCl4 vapors and dry cotton cellulose has been studied. The process is compared to the liquid phase one. In both cases titanium oxychlorides are mainely formed on the surface of the cellulose fibers at room temperature. Heating of such fibers in air at 500 oC produces long anatase titania deformed hollow fibers consisted of fine films of 100-200 nm thickness. The BET surface of the fibers is of 25.6 m²/g including micropores surface of 5.3 m²/g, and a pore volume of diameter less then 451 nm is of 0.078 cm³/g. The efficient photocatalytic oxidation of methylene blue over synthesized titania fibers is demonstrated.