The practical application of hydrogen as new energy vector presents several problems that have not been solved yet. One of the major constraints is the lack of a safe, compact and efficient way to store hydrogen, mainly for mobile applications. Solid–hydrogen storage is one of the potential solutions. The reaction 2LiBH4 + MgH2 ↔ MgB2 + 2LiH + 4H2 has interesting characteristics for hydrogen storage purposes. It has a proper thermodynamic stability (ΔH = 40.5 kJ.mol-1 H2) which involves a reduced hydrogen desorption temperature (Tdesorption= 225 ºC at 1 bar). It also has a high hydrogen storage capacity of 11.45 wt. % H2 1, 2. Nonetheless, kinetic constraints preclude desorption temperatures below 400 ºC. The formation of MgB2 is responsible for the reversibility of this reactive hydride composite (RHC). Therefore, by modifying the formation kinetic of MgB2 and/or altering MgB2 itself, lower desorptiontemperature and an improved kinetic behavior of the RHC can be reached. For instance, the addition of a Ti based additive noticeably enhances the kinetic behavior of the RHC, i.e. stable desorption kinetic in anextremely short time. In the present work, X-ray diffraction, thermal analyses and volumetric techniques, among others, are used to investigate the effect of Ti based additives as well as the doping of MgB2 with Al on the kinetic behavior of this promising RHC. 1 Barkhordarian G., Klassen T., Bormann R., German Patent pub. no.: DE102004/061286; 2004. 2 Vajo J.J., Skeith S.L., Mertens F. J Phys Chem C 2005; 109: 3719-3722.