have been considered as candidate binders. PMMA is regarded as a more suitable one because it is easy to be obtained and it has a low decomposing temperature (under 380 C), very low content of residuals (lower than 0.02%, mass fraction [25]) and no pollution to environment. In respect of reinforcement selection, ceramic fibers, such as SiC [2–4,6,11] and Al2O3 [5,7], are considered as excellent reinforcement candidates to produce TiAl matrix composites, due to their excellent thermal stability, high specific modulus and strength both at room and at elevated temperatures (up to 1000 C), regardless of their high price. However, despite the great potential to improve the matrix strength, brittle ceramic fibers damage easily during consolidation process and also have a limitation in enhancing the toughness of brittle matrix at room temperature. Therefore,attempts to apply other good fiber reinforcements require to be carried out. Slurry casting using PMMA as binder, another alternative route based on CBPC, has been proposed in this work. Metallic molybdenum fibers were firstly used to reinforce TiAl with the purpose to improve the room temperature toughness and high temperature
strength, because it has good toughness, high melting point, good microstructure stability and high strength at elevated temperature. Detailed fabricating route, including preparing preforms by slurry casting and subsequent consolidation by vacuum hot pressing,was described. Microstructure and mechanical strength of the obtained composites were also investigated.