This study examines the effect of titanium content on the processing and microstructural evolution of Al2O3-Ti composites fabricated by slip casting. Two compositions with 1 vol.% and 10 vol.% Ti were investigated. Rheological tests revealed that low Ti content increased slurry viscosity but promoted more uniform packing and densification. After sintering at 1400 °C, the 1 vol.% Ti composites achieved high relative density (>93%), negligible open porosity, and formation of a stable Ti0.25Al1.75O3 phase. In contrast, the 10 vol.% Ti composites showed poor densification (~77%), high porosity, and the presence of unstable Al2TiO5 and residual TiO2. These results demonstrate that 1 vol.% Ti is optimal for producing dense, defect-free Al2O3-Ti composites, while excessive Ti content leads to phase instability and microstructural degradation. The findings highlight slip casting as a viable method for designing alumina-based composites with tailored phase composition, offering potential for structural, thermal, and biomedical applications where both durability and reliability are required.