Mo-ODS alloys have excellent mechanical properties, including an improved recrystallization temperature, greater strength due to dispersed oxides, and the ability to suppress grain growth at high temperatures. In ODS alloys, the dispersed Y₂O₃ and added Ti form Y-Ti-O complex oxides, producing finer particles than those in the initial Y₂O₃. The complex oxides increase high-temperature stability and improve the mechanical properties of the alloy. In particular, the use of TiH₂ powder, which is more brittle than conventional Ti, can enable the distribution of finer oxides than is possible with conventional Ti powder during milling. Moreover, dehydrogenation leads to a more refined powder size in the reduction process. This study investigated the refinement of Yi₂Ti₂O₇ in a nano Mo-ODS alloy using TiH₂. The alloy compositions were determined to be Mo-0.5Ti-0.5Yi₂O₃ and Mo-1.0Ti-0.5Yi₂Oi₂. The nano Mo-ODS alloys were fabricated using Ti and TiH₂ to explore the effects of adding different forms of Ti. The sintered specimens were analyzed through X-ray diffraction for phase analysis, and the microstructure of the alloys was analyzed using scanning electron microscopy and transmission electron microscopy. Vickers hardness tests were conducted to determine the effect of the form of Ti added on the mechanical properties, and it was found that using TiHi₂ effectively improved the mechanical properties.