Strain-hardening alkali-activated composites ( SHAAC) is featured by both low carbon footprint and high toughness, but the high cost has limited the engineering applications. To reduce costs, this study explored the substitution of PE fibers with PP fibers to develop a hybrid PE/ PP fibers SHAAC. Through axial compression and tension tests, along with cost analysis, the study investigated the influences of different replacement ratios of PP fibers (0% , 25% , 50% , 75% and 100% , volume fraction) on the axial compressive, axial tensile performance, and cost of the hybrid PE/ PP fiber SHAAC. The results indicat that the axial compressive and tensile strength of SHAAC decrease when PE fibers are replaced with PP fibers, along with its crack control ability. However, SHAAC can still exhibit pseudo-strain hardening and multiple-cracking phenomenon when the PP fiber replacement ratio is below 75% . When the PP fiber replacement ratio is 50% , SHAAC shows the highest ultimate tensile strain (8. 40% ) while maintaining high axial compression and tension strength. Moreover, costs can be reduced by 29. 00% , and the ratio of tensile parameters to cost is maximized.