Abstract: In this paper, Ti₃O₅@(CS) composite catalyst was prepared via impregnation method and high temperature annealing, and Sm₅Mg₄₁+5% Ti₃O₅@CS (mass fraction)composite material was fabricated by mechanical ball milling. The microstructure and phase composition of the composites before and after hydrogen absorption/desorption were characterized, and the effect of Ti₃O₅@CS addition on the hydrogen storage properties of the composite was investigated. The composite is composed of Sm₅Mg₄₁, SmMg₃ and Ti₃O₅ phases before hydrogen absorption, and of Sm₃H₇, MgH₂ and Ti₃O₅ phases after hydrogen absorption. Ti₃O₅@CS prepared from high-concentration titanium n-propanoxide solution shows a high catalytic effect on hydrogen storage kinetics. After the addition of Ti₃O₅@CS, the dehydrogenation activation energy of Sm₅Mg₄₁ is reduced to the minimum of 112 kJ/mol(H₂), and the initial dehydrogenation temperature is decreased to the minimum of 262 ℃.