Titania nanowire arrays were fabricated by interactions of Ti substrates with hydrogen peroxide solutions containing melamine and nitric acid at a low temperature of 353 K for 72 h, followed by a subsequent thermal treatment at 723 K for 1 h. The titania nanowire was anatase with a mean diameter of 25 nm and an aspect ratio of ca. 40. The film possessed high activity to assist the photodegradation of rhodamine B in water under the illumination of simulated solar light.