Most of the early game items you craft in Subnautica 2 can be fabricated from the basic resources you find around you. Titanium, bronze, and even plant fibre are readily available and require no refining to be useful for basic applications. Once you begin to venture further from your base, however, you need better equipment and more sophisticated ingredients, such as Titanium Ingots. Improving is key in survival games like Subnautica 2, especially when the environment is so hostile. You quite literally cannot survive on your own and need to even the odds with improved equipment. Titanium ingots are vital for Tadpole construction, but refining the raw materials into something more useful requires a few steps.