Process parameters for the formation of mullite fibers by the Inviscid Melt Spinning process were determined using a factorial design analysis. Mullite fibers were produced from a 3:2 mullite melt (M.P. = 1830 degrees C) via Inviscid Melt-Spinning (IMS) in a BN crucible, under an argon atmosphere, at a melt temperature of 2000 degrees C and spinning pressure of 40 psi. A heating rate-holding time program of 80 degrees/min and 8 minutes, respectively, was used for the fiber-making experiment.