I don't know if anyone else still has the issue crafting Titanium rods. If you do make sure you got Factorio-Extended-Plus not installed. Since on the first page its says "NOT compatible with: Factorio Extended Plus as it was/is an alteration on the original version". I didn't realize it until I saw it on the information tab. Once I uninstalled the mod; boom it fixed that issue.
Thanks NathGamer for a great mod for over the years. Played the mod since 0.15. Have a good day.