There are two problems I see here:

1. It is highly unlikely that we could find a way to mass-produce any such advanced material cheaply. If you look around in our world, mass-produced materials usually require highly tuned manufacturing technologies that took decades to develop, and also often rely on even more advanced materials. Concrete is a good example, it's easy to make in principle but making GOOD concrete needs not just machinery and very specialised knowledge of material science and engineering, but also a lot of process (what testing regime to use for example).

I agree with @biziclop. For instance, it is actually very likley that any non natrual RTS (So a substance that does not occur in nature natrually) would be such a pain to make it is basically unusable. Thats why the "cheap" part is so important.

This is true for the Aliens as well though. If it is a pain for us to produce, it will be one for them to. So if we find any special materials it is likley they can at least be produced with manageable costs. Otherwise they would not be used. Though this could be a fallacy because we dont know what the ship was for. It could be that it used special…

Why a sphere ? Seems like a pretty bad shape for something (Presumably) interstellar ? Also what is a 4D printer in this context ?

Generally speaking, i would say any interstellar ship could yield

- Advanced heat resistant materials
- very good kinetic resistant materials (Bullet proofed stuff basically)
- very good Radars and potentially lasers
- Maybe some sort of self healing / repair mechanism
- Stupidly advanced engines. Potentially RTS for Anti Matter containment if they use Anti Matter catalyzed propulsion. Either for something Orion ish or in straight up engines like the ISV´s fro…