Folks have successfully steam bent timber, most notably Mr. Levin who published an article on the project and the process in FWW many years ago.

I have worked Ash many times and find it fine framing timber, though it does check heavily. The properties that make it the choice of basket makers, the ability to, with finesse easily separate the layers into slats, might make me hesitant to attempt forced bending. Though that is pure supposition and gut reaction.

I have much experience in the milling of, and framing with natural curves including Ash, and can offer advice in that. I would start by suggesting that having in mind some particular species, most especially with your need for such a tight radius in such a short stick, adds unnecessarily to the time needed in finding it.

Be your best