This week I got some good news: Researchers at The MTC had begun printing one of my latticed bike stems.
This part was printed in titanium 6/4 on an Arcam A2X. Unfortunately the build failed at 14mm high; on the upside, it appears that the failure was *not* caused by my part. It's a bit early to make any judgments about its feasibility, but I'm pleased to see that these beam diameters (which are between .8mm and 1.8mm) seem to print without support structures. As you can see below, many of them (almost all, in fact) had very low angles relative to the XY plane.
I'm hoping to have more progress on this soon. Thanks to my friends at The MTC for their help with printing - and with debugging the design!