If you don't want to use Ti, just go with 15N20. It's about as stainless as a lot of stainless and comes in appropriate thicknesses, precision ground and spring tempered off the shelf. In this condition, you can work it as is and you don't have to HT.
If they have scrap 17-4 or 17-8 sheet that would be great (It's usually pretty expensive). You can work it soft and the HT is just 900F for an hour or so and let cool. No quench. Develops about 45 Rc with outstanding wear characteristics.
The cheapest high-performance non-Ti solution, is the 15N20, IMO.