Titanium connecting rods with holes in the shaft to remove material for less weight?
Titanium is already lightweight and in a connecting rod it is used obviously for strength. Well, have you seen this approach before? Taking a titanium rod and removing material.
Seems like self-defeating but I guess since the material is titanium it is still stronger than some OEM cast rod while being much lighter. Material is obviously removed to keep it as light as possible so in a high revving application that is paramount.
These are going in a 12000 rpm all motor Honda B-Series stroker:


http://www.bimmerboost.com/showthread.php?39712-Titanium-connecting-rods-with-holes-in-the-shaft-to-remove-material-for-less-weight