Grain7xxx Aluminium alloys refining rods are instrumental ingredients to achieve small equiaxed grains in direct chill castingCasting of aluminum alloysAluminum alloy. AlTiB and AlTiC grain refinersGrain refiner are both widely used in industrial production, but the quality of the grain refinerGrain refiner microstructureMicrostructure, such as particle size distributionDistribution, the presence of particle agglomerates, and homogeneity of the composition can all have a significant effect on the final cast aluminiumAluminium microstructureMicrostructure. However, the relationship between nucleating particle agglomerates and the final cast microstructureMicrostructure is not fully understood. In previous TMS2020 and TM2023 studies, we presented evidence of AlTiB particle size distributionDistribution on grain refinerGrain refiner efficiency and established a Cellular-Automated-Finite-Element (CAFE) model to predict the final microstructureMicrostructure. This work focuses on the effect of TiC agglomerates on the efficiency of Al-3 wt%Ti-0.15 wt%CAl-3 wt%Ti-0.15 wt%C based grain refinersGrain refiner in 7xxx alloys with and without CeramicCeramics Foam Filtration prior to castingCasting.