What does Solus Bound Title mean?

Anyone know? Just got it, and the description just says you are bound for the last star.

Bound

adjective

heading toward somewhere.
“trains bound for Chicago”

•destined or likely to have a specified experience.
“they were bound for disaster”

Solus

name of the last star

I think those obscure titles are just from command rank milestones, with the Battleborn one (or w/e it’s exact name is) being for level 100.

Ahhh okay. Thanks

Command rank 25?