Best filament for articulated and print-in-place models

The short answerPLA for rigid joints. TPU for flex joints.

Articulated models print in place with moving joints. PLA is the pick for rigid, hinged joints that snap together. TPU is the pick for flexible, living joints that bend. The design decides.

What an articulated model asks of a filament

A print-in-place model has joints that must move right off the bed. A rigid joint needs a stiff filament that holds a clean tolerance. A flex joint needs a soft filament that bends without breaking. The wrong pick fuses the joints or snaps them.

How the materials compare

When to pick PLA

Pick PLA for rigid articulated models with hinged joints. It prints crisp details and clean tolerances at 200 to 220 °C, per the Prusament PLA datasheet, so the joints break free cleanly. PLA is the standard for print-in-place dragons and figures.

When to pick TPU

Pick TPU for flexible, living joints that bend. The Polymaker PolyFlex TPU95 sheet lists a nozzle of 210 to 230 °C. TPU joints flex instead of snapping, which suits grabbers, chains, and flex designs.

For the materials, read the PLA guide or the TPU guide. For hinge designs, see best filament for hinges.