>Trees have to be big, strong, lightweight, and bendable. Homogeneous materials won't work for that application.
Why wouldn't titanium work for that application? (Assume that somehow the plant can move nutrients and fluids around some other way.) Or even steel, as long as it's not solid? Obviously, nature can't produce hollow steel tubes, but lots of metals satisfy your requirement list here.
Why wouldn't titanium work for that application? (Assume that somehow the plant can move nutrients and fluids around some other way.) Or even steel, as long as it's not solid? Obviously, nature can't produce hollow steel tubes, but lots of metals satisfy your requirement list here.