Fiber-reinforced cementitious composites (FRCC), particularly engineered cementitious composites (ECC), are widely recognized for their exceptional tensile performance and durability. However, their dense microstructure, due to the absence of coarse aggregates, presents challenges under fire exposure. Among the various factors influencing fire performance, fiber type plays a critical role in determining spalling resistance. It is commonly believed that low-melting-point fibers improve spalling resistance by creating channels upon melting, which helps mitigate internal pressure build-up. Hybrid fiber combinations, which incorporate both low-melting-point and high-melting-point fibers, have also shown potential in maintaining strength after fiber melting and enhancing spalling resistance. However, a key debate in the literature revolves around which parameters most significantly contribute to spalling resistance. While lower melting point fibers (e.g. polyethylene (PE) fiber) are expected to improve performance, research does not consistently support this hypothesis. In fact, fibers like polyvinyl alcohol (PVA), which have much higher melting points (~250 ℃ for PVA vs ~140 ℃ for PE), are often found to provide better spalling resistance. Moreover, some studies have provided evidence of better spalling resistance in steel-FRCC (steel fiber melting point > 1000 ℃). However, a clear analysis of the current findings and prevailing mechanism remains unclear. This paper critically examines the current body of research on cementitious composites reinforced with various fiber types to identify key factors influencing spalling resistance. By exploring the governing parameters and mechanisms, the study aims to provide guidance for future material selection to improve the fire performance of FRCCs.