Abstract: Lattice materials are attractive for their light-weight, highspecific strength and high specific stiffness. Together with theirvarious thermomechanical properties, they have applications in ultralight structures, aswell as in impact/blast systems, heat dissipation media,acoustic isolation, microwave absorption structures and actuation.The topology criterion for stretching-dominated materials makes these latticematerials much stiffer and stronger than foams and honeycombs,especially those of low relative density. The types of lattice materialsinclude the octet-truss lattice material and sandwich panels with differernt latticecores, as summarized in this paper. The corresponding manufacturingmethods: the investment casting method and the perforated wrought metal sheet foldingmethod are compared. The mechanical behaviors of latticematerials are discussed in light of the experimental results, and compared with othercellular materials, especially with respect to the critical effects of imperfections tolattices and foams. The applications in actuating and heat transferring and the numerical modeling are introduced. The authors' researchesin carbon fiber reinforced lattice materials are specially addressed, including the3D interlaced carbon fiber reinforced lattice and the interlocked carbonfiber reinforced grids. The recent progresses in stealth carbon fiberreinforced grids are also outlined.