Greg said all this is temporary - he is planning to add blast furnace. There will be changes even to steel. I recommend two paths (I've done both):
1. If you like exploring, GregTech fort has a chance to generate with titanium safe.
2. Lava centrifuging. Just don't forget that there is a machine for making 1 plate from 1 ingot. Some time ago I calculated that it takes 15 hours at minimum centrifuge speed.
OK , in my file I successfully use Chromium Crucible to melt Iridium to solve this question. (Though it cost me 2 Chromium Crucible and 20+ Iridium.Whaever, thank your reply.