Electrode Induction Melting Gas Atomization (EIGA) is a crucial technique for producing ultra-high-purity metal powders, as it is a crucible-free powder production method. This study focuses on the nickel-based superalloy FGH96 and the titanium alloy TC4, and investigates the effects of atomization pressure and gas temperature on the particle size, morphology, and hollow powder content of the alloys. The study combines atomization experiments with powder characterization. The results show that at a gas temperature of 25°C, increasing the atomization pressure from 2.5 MPa to 4.0 MPa, reduces the median particle size (D??) from 96.3μm to 75.5μm. The sphericity reaches its maximum value 0.9805 at an atomization pressure of 3.5MPa. The powder volume porosity also exhibits a trend of first increasing and then decreasing. At an atomization pressure of 4.0MPa, as increasing the gas temperature to 100°C the powders further refine, with the D?? values for FGH96 and TC4 powders decreasing to 63.8μm and 86.0μm, respectively. The gas heating effect is more pronounced for the superalloy powders. As the gas temperature rises, the powder sphericity of the superalloy remains unchanged, while the powder sphericity of the titanium alloy increases slightly. The powder volume porosity of the superalloy slightly increases. Due to differences in viscosity, surface tension, and density between the two alloy melts, powder characteristics such as particle size and morphology exhibit distinct variation trends. This study provides a theoretical basis for the customization of powder preparation processes for different types of alloys.