Yes, and my (speculative) guess is that the new SpaceX Starship heat shield is basically working on the conceptual basis of a "steam iron":
- A titanium+steam heat shield is infinitely reusable. PICA-X SpaceX's ablative heat shield material at the moment which is used on the Dragon spacecraft, ablates several millimeters per landing, and is also very brittle.
- The "ablative material" is water instead, which can be refilled on Mars with low tech ISRU - PICA-X which needs a complex industrial base making carbon fiber and impregnates.
- The load bearing structure is a pure metal structure with very good heat conduction properties and it is also a good heat sink. While re-entry heat load is in the megawatts of heat per square meter, much of that is ablated - residual heat flux reaching the metal surface is in the kilowatts per square meter range. Still hot but manageable.
- This new Titanium allow has similar strength per weight to carbon fiber, allowing SpaceX to standardize on metal structures alone, which is their main specialty with the Falcon 9 already.
- Metal can be 3D printed much more easily than carbon fiber.
The "ironing surface" (heat shield) would be made of O₂ doped Titanium alloy - which might also be used to make the lightweight, high-strength frame of the Tesla Pickup Truck with a body-on-frame skateboard design.
The superior strength/weight ratio of Ti-O2 is what makes it a superior material choice for a 200kWh class EV pickup truck that must carry ~2 tons of batteries in its frame. It would be a lighter yet stronger frame than steel or aluminum based frames.
To address
@KarenRei's reply: obviouslyTesla would use a less expensive titanium alloy as SpaceX, but both would still use the O₂ doping process which works on a wide range of alloys. (Note: SpaceX might have already known this technique already but it could be classified like most metallurgical technologies of aerospace - now that it has been independently discovered by Chinese scientists it's out in the open for Tesla to use.)
I'd not be surprised to see shared R&D between Tesla and SpaceX, and maybe shared branding as well - like Elon already alluded to with the "SpaceX Options Pack" with the Roadster 2.