The reaction of H atoms with TiCl4 was studied behind reflected shock waves at temperatures between 1190 and 1500 K and pressures around 1.5 bar by applying atomic resonance absorption spectrometry for time-resolved measurements of H atoms at the L-alpha line. The thermal decomposition of ethyl iodide (C-2-H5I) served as the H atom source. By using a high excess of TiCl4, the consumption of H could be modeled by pseudo first-order kinetics. For the reaction TICl4 + H --> TiCl3 + HCl a temperature-independent rate coefficient of k(1) = 3.5 +/- 0.9 x 10(13) cm(3) mol(-1) s(-1) was found for the temperature range of the present experiments.