Controlling the mechanical properties of two-dimensional transition metal dichalcogenides (TMDs) is essential for their integration into advanced flexible electronic and optoelectronic devices. Alloying these materials allows modulation of their optical characteristics and energy structure, greatly improving their design flexibility and functionality. However, the impact of alloying on their mechanical behavior has remained uncovered. We developed a novel means for alloying suspended TMD devices. Specifically, we synthesized Mo