With high-speed laser melt injection (HSLMI), it is possible to generate wear-resistant metal matrix composite (MMC) surfaces on tools with great productivity. Since high laser intensities are required for reaching high process speeds, strong interactions between powder particles and the laser beam can occur. In order to reduce the interaction time and to receive a better understanding of the role of particle transport in the HSLMI process, trajectories of spherical fused tungsten carbide (SFTC) particles were analyzed by high-speed imaging. The trajectories were divided into the path from the powder nozzle to the weld pool surface and the incorporation path. First, it was investigated how the travel time is affected by the volume flow rate of the feeding gas and by the powder feed rate. Second, the incorporation of the SFTC particles was analyzed and the incorporation time was measured. It was found that the volume flow rate has a decisive influence on both the travel time and the incorporation time of the particles. Consequently, an increased volume flow rate lead to a significant reduction of the interactions between SFTC particles and the laser beam. Furthermore, a decrease in incorporation time was determined towards the center of the weld pool. Whereas the majority of the SFTC particles was incorporated immediately, some particles dwelled on the surface of the weld pool before being incorporated.