Question: what are the most common materials used in 3d printers?
Answer: Polylactic Acid (PLA). This versatile and relatively low cost printing material that is readily available and can be used for many articles. ... 
Acrylonitrile Butadiene Styrene (ABS). ... 
PolyAmide (PA). ... 
High Impact Polystyrene (HIPS). ... 
Thermoplastic Elastomer (TPE).