Ordered three-dimensional (3-D) cage-like mesoporous mixed tungsten-titanium oxides (WO3-TiO2) with relatively high surface area (152 m(2) g(-1)) have been synthesized by employing Pluronic F108 triblock copolymer as a structure-directing agent via "acid-base pairs" strategy. Such materials exhibit enhanced electrochromic properties with the contrast ratio (T-b/T-c) of approximate to1.8 at 550 nm.