Powders of AlMgB 14 , ZrB 2 , and HfB 2 were combined by high-energy milling to produce AlMgB 14 +60vol.% ZrB 2 and AlMgB 14 +60vol.% HfB 2 composites. The powder constituents were hot pressed at two different temperatures, depending on prior conditioning of the milling vials. SEM and EDS were used to analyze microstructure impurities, and fracture mechanisms. XRD was used to verify proper phase formation and to check for impurity phases. The bulk AlMgB 14 +ZrB 2 and AlMgB 14 +HfB 2 show up to 97.3% and 98% densification, 22.2 and 24.5GPa hardness (measured at 5K-gf), and 4.1 and 3.7MPa(m) 1/2 toughness, respectively. Also the study of bulk AlMgB 14 +ZrB 2 and AlMgB 14 +HfB 2 composites has shown that these materials exhibit high resistance to erosive and abrasive wear. Multi-hour ASTM erosion tests with Al 2 O 3 abrasive material against composite samples comprised of AlMgB 14 (40vol.%)+ZrB 2 (60vol.%) and AlMgB 14 (40vol.%)+HfB 2 (60vol.%) resulted in erosion rates as low as 4.49mm 3 of (AlMgB 14 +ZrB 2 ) wear per kg of erodent and 2.85mm 3 of (AlMgB 14 +HfB 2 ) wear per kg of erodent. These values were compared with 14.9mm 3 /kg for wear-resistant grades of WC–6%Co.