Liang Dong has developed a novel technique for making titanium cellular materials with a highly efficient octet truss structure. His recent paper in the International Journal of Solids and Structures "
Mechanical Response of Ti-6Al-4V Octet-Truss Lattice Structures" shows that the cellular structure is of similar density and strength to engineered balsa wood, but offers the greatly improved corrosion and high temperature resistance and titanium.