The microstructural features and fracture behavior of CeO₂- and Pr₂O₃-doped Y₃Al₅O₁₂/Al₂O₃ eutectic composites grown by an edge-defined film-fed growth (EFG) technique were studied. The microstructures of the composites were examined using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Fracture toughness and crack propagation behavior of the composites were investigated using an indentation technique. The fracture toughness (K_1C) of CeO₂- and Pr₂O₃-doped Y₃Al₅O₁₂/Al₂O₃ eutectic composites were measured to be 4.99 MPa m^1/2 and 2.79 MPa m^1/2, respectively. Crack deflection was observed occasionally in both CeO₂- and Pr₂O₃-doped Y₃Al₅O₁₂/Al₂O₃ eutectic composites.