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Figure 2. Morphology, particle size distribution, and physical characteristics of the powders and wire-powder feeding process: (A-C) SEM images, corresponding EDS elemental maps, and particle size distributions of Ti-6Al-4V, Fe, and TiO₂ powders, respectively.(D) In-situ photograph of the wire–powder synchronous feeding process in the LM-WPSF system. (E) SEM morphology of the O-Fe microalloyed Ti-based composite powder. (F) High-resolution SEM image showing detailed surface features and nanoparticle decoration on the powder particles.