Abstract: In this study, the linear and mass attenuation properties of Aluminum titanate (Al2TiO5)-Spinel (MgAl2O4) composites were investigated for Co-60 gamma source Aluminum titanate - Spinel ceramics composites which have different Aluminum titanate percentages (0%, 5% and 10%) were produced and performed against Co-60 gamma source. Co-60 gamma source which has mean gamma energy at 1.25 MeV and pair production event also takes place beside the photoelectric event and Compton scattering. Gamma transmission technique was used in the experiments. Linear attenuation coefficients and half value layers were carried out for the studied samples. Increasing Aluminum titanate percentage in the samples caused the higher half value layers of the composites against Co-60 gamma source. The experimental mass attenuation coefficients were compared with the theoretical mass attenuation coefficients resulted from XCOM computer code. Experimental results were compatible with the theoretical results. In conclusion, increasing the Aluminum titanate ratio in the Al2TiO5-MgAl2O4 ceramics composites decreases the gamma shielding property of the Al2TiO5-MgAl2O4 ceramics for nuclear shielding applications.