In this work we report the formation kinetics and microstructural properties of Mg1-xTix powder metal hydride systems (x = 0.1, 0.2, 0.3, 0.4, 0.5), obtained by reactive ball milling (RBM) via three different ways. The resulting MgH2-TiH2 nanocomposites are characterized and an optimal composition is found. Differences among the preparation routes are analyzed. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.