Fused Deposition Modeling (FDM), also known as Fused Filament Fabrication (FFF), is a popular 3D printing technology in additive manufacturing. It involves melting thermoplastic filament through an extruder and depositing it layer by layer onto a build platform to create three-dimensional objects. FDM is widely used for prototyping, functional testing, and small-batch manufacturing because of its affordability, material versatility, and ability to produce durable, precise components.