According to the machinability ratings [1], Inconel 700 is rated at 0.09 (less is harder) and Inconel 702 at 0.11, while most of the Titanium alloys are above 0

According to the machinability ratings [1], Inconel 700 is rated at 0.09 (less is harder) and Inconel 702 at 0.11, while most of the Titanium alloys are above 0.15. There's a single Titanium alloy family (MST) in the table that is just as hard to machine as Inconel 700. So, you're technically correct: generally, they are on the same scale. And your argument about ignitability is certainly true. 1. http://www.quakerchem.com/wp-content/uploads/pdf/skill_builders/no10_machinability_ratings.pdf http://www.quakerchem.com/wp-content/uploads/pdf/skill_build...