By far, the strongest 3D printer filament that you can get for consumer use is polycarbonate. Polycarbonate, known as PC for short, is an insanely strong plastic material that’s commonly used for parts that require high durability, like medical components, robot frames, and so much more.

At the low-cost consumer level, the strongest 3D printer filaments in terms of tensile strength include polycarbonate (PC), polyethylene terephthalate glycol-modified (PETG), and polylactic acid (PLA). Weak materials include thermoplastic polyurethane (TPU) and acrylonitrile butadiene styrene (ABS).