<p>An assessment of the consequences of reinforcement in corporation factor (RIF) for Al₂O₃-LM6 cast composite has been reported for this experimental work. Initially, the Al₂O₃ reinforced semi-solid cast composite was synthesized by using the dual mixed slurry. According to the experimental results for the RIF evaluation, the RIF value is directly governed by the combined effects of ball milling, reinforcement size, and slurry formation. Conversely, the microstructure also indicated a significant impact of the dual mixed slurry according to the function of RIF, and an impact of brittle particle inclusion is observed with a RIF value of 0.93 and higher range. RIF value confirms that the value increases when particles are added to the slurry prior to pouring. The microstructure of the cast composite at different points inside the hollow further supports this. The majority of the particles settled inside the cavity, forming several Al₂O₃-LM6, Si, and Al₂O₃ aluminum interfaces. A decrease in size and appropriate blending of brittle and soft reinforcement particles confirms decreased density mismatch, which further increases reinforcement flow and, thus, this particle rejection decreases. An average micro-hardness value of the 4% Al₂O₃ addition is 15.8% higher than that of the 2% Al₂O₃ addition, the effect on the interfacial phase is almost the same, whereas the effect is 11.6% higher when compared to 3% Al₂O₃. For 4 and 3% Al₂O₃ addition, the highest value for the influence of Al₂O₃ on the LM6 matrix is 149.1 HV, which is approximately 15.8 and 11.6% higher than 2% of Al₂O₃, respectively. Over the unmodified LM6 alloy, the 3% Al₂O₃ alloy depicts a 17.65% increase in maximum tensile strength, while the cast material shows a maximum increase of 39.72%. Furthermore, the 4% Al₂O₃ modified cast composites, 7.45% strain increase is almost equal to that of the 2 and 3% Al₂O₃ modified cast alloys.</p>