新型碳材料增强钛基复合材料具有高比强度、比刚度和抗高温特性等优点，成为航空航天和武器装备等领域中的重要结构材料。然而碳材料增强体存在严重的团聚问题造成材料性能提升不足，已经成为限制其发展的关键瓶颈问题。本项目提出以氧化石墨烯和碳纳米管作为多元增强体，制备钛基复合材料，借助氧化石墨烯表面的官能团作用, 加强碳纳米管的分散性，发挥两者在结构和功能上的协同、耦合效应，充分改善基体的力学和物理性能。为此本项目采用第一性原理、分子动力学模拟和实验研究相结合的手段，重点开展：1) 揭示两种增强体之间的相互作用以及分散性效应；2)明确多元增强体与基体之间的界面物理化学过程，并获得界面组织、结构和性能之间的关系；3)揭示多元增强体对基体的“协同效应”强化机理，实现复合材料的性能优化，为满足其在诸多工程领域中的应用需求提供技术和理论支持。

Titanium matrix composite(TMCs) reinforced by novel nano carbon material are potential structural materials in the fields of aerospace and military due to their high specific strength, high specific stiffness as well as superior high temperature performance. However, their large-scale applications are limited because of the strong agglomeration tendency of nano-carbon material and insufficient improvement performance for TMCs. To overcome the above deficiencies, here, TMCs reinforced by hybrid carbon nanofillers, i.e., graphene oxide and carbon nanotube, will be fabricated. It is expected that the dispersion of carbon nanotube in metal matrix will be enhanced by a range of reactive functional groups on the surface of graphene oxide. Besides, the mechanical and physical properties of the composite will be strengthened by a synergistic effect between the structure and function of the graphene oxide and carbon nanotube. Experiments, first-principles simulations and molecular dynamicswill be carried out in this project to address the following scientific issues: 1) Revealing mechanisms of interaction between two reinforcements and its impacts on the dispersion; 2) Understanding the physica and chemistry process of interface between reinforcements and matrix and then obtaining the relationship between texture, microstucture and properties of the interface; 3)Uncovering the "synergistic effect" of reinforcements on strengthening mechanism of the composite. The obtained knowledge can provide theoretical and technical supports for promoting the production and application of titanium matrix composite in the engineering field.