The explosibility of hybrid H-2/Ti dust in the production of metal hydride TiH2 was simulated and studied using a 20-L spherical vessel. The influential factors for the explosion performance of hybrid H-2/Ti dust, including particle size distribution and polydispersity, humidity, temperature, hydrogen content, inert gas and degree of reaction, on hybrid explosion were investigated. Results showed that both the mean particle sizes and particle size polydispersity had significant effects on the dust severity of hybrid H-2/Ti dust. The explosion severity of hybrid H-2/Ti dust was enhanced at a higher temperature in a certain range, and it presented a trend of increasing at the early stage and then decreased both for the increasing humidity and hydrogen pressure. Explosion inhibition effects of typical inert gases for hybrid H-2/Ti dust increased in the following order: argon < helium < nitrogen. The values of (dP/dt)(ex) and V-f decreased along with the reaction process, while the value of P-ex kept stable, which showed that the hydrogen state had no obvious impact on P-ex but significantly affected the explosion risk of hybrid H-2/Ti dust, and special attention should be paid to the initial stages of the production process of TiH2. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.