The purpose of this work is to evaluate the mechanical and damping properties of triaxial woven carbon fiber reinforced polymer (CFRP).First,the mechanical property of triaxial woven CFRP was evaluated from low to high temperatures.The single-layer triaxial woven CFRP was used for the experiment.One example deals with the triaxial woven CFRP specimens subjected to loading along an axial yam direction.The other example deals with other triaxial woven CFRP specimens subjected to loading transverse to the axial yarn direction.Tensile tests were performed in a thermostatic chamber at 100 K,room temperature,and 373 K with displacement control of O.1 mm/min,and the fracture load was measured.The effects of temperature and loading direction on the fracture load were then discussed.Next,the damping improvement of triaxial woven CFRP was examined.We made multi-functional triaxial woven CFRP by impregnating barium titanate (BaTiO3) nanoparticles into a polymer matrix.The specimen from triaxial woven CFRP with BaTiO3 nanoparticles was prepared,and free vibration test was carried out to evaluate the damping property of the triaxial CFRP canlilever with BaTiO3 nanoparticles.The displacement of 0.25mm was applied near the free end and released quickly.The amplitude of the displacement was then measured with a laser displacement meter.The loss factor was then calculated,and the effect of volume faction on the loss factor was discussed.