Installed Mods:
ContentTweaker 1.12.2 - 4.10.0
B.A.S.E 1.12.2 - 3.14.0
CraftTweaker - 1.12.2 - 4.1.20.698
ModTweaker - 1.12.2 - 4.0.20.11

crafttweaker.log : https://pastebin.com/91YTLxPe
materials.zs : https://pastebin.com/utEuKhhJ

In this example the titanium never receives a block. I did add it to the "registerParts" function very late. After adding multiple other materials and restarting the game multiple times. Additonally, trying to register the part with the "registerPart" function also does not work. I have tried that. All other blocks in this script work and are being registered. I could also add the block by hand in my block.zs script but that seems kind of redundant. (Also my texture making skills are terrible :)

Thank you for an answer in advance.

After loading the script with errors. The block is being registered.