The explosive thresholds H-cr of the composites cyclotrimethylenetrinitramine (RDX)-Al and pentaerythritol tetranitrate (PETN)-Al under the action of neodymium laser (wavelength 532 nm, pulse duration 14 ns) were experimentally determined for the first time as a function of the aluminum content. The experiments were performed using aluminum nanopowder with average diameter 100 nm. The gas-dynamic energy losses were prevented. The minimal thresholds achieved in the experimental conditions were determined that are H-cr = 1 J/cm(2) for the composites RDX-Al at the mass fraction of Al 0.2% and H-cr = 0.33 J/cm(2) for PETN-Al composites at aluminum mass fraction 0.1%. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.