Oh, I'm not quite there with needing ti bolts everywhere. I would use whatever came in the mounting pack for the rack, probably bog standard steel ones.
Will update later how he advised against the rack but while it might sound nice ti is more a material not ideal for racks and what they have to do. And it wasn't that you can't weld them touring around the world.
Yes I was talking about getting exactly this rack with Mark at SBC and he explained.