Turns out there is "bone-simulating" filament out there. Working towards a patient-specific model to plan surgeries on complex chest wall defects. Printed a test rib to see if it saws like the real thing.

Filament is 3DXTech Simubone Printed on Bambu X1C with 75% infill

I'm gonna need a bigger printer to do the whole thing. Have my eyes on the massive Elegoo printer, but still have to work out how to attach the TPU cartilage to the PLA bone from the ribs and make it behave like the real thing.