Military looking to 4D printing to develop weapons that assemble themselves, last longer and adapt to specific conditions on command.

3D printing or additive manufacturing is ongoing revolution in manufacturing with its potential to fabricate any complex object and is being utilized from printing small components to full drones on Naval vessels, printing replacement parts for fighter aircrafts to printing ammunitions, textiles, metals, human organs, clothing, buildings and even food. Now 3D printing is evolving into 4D printing, which is the ability to 3D-print objects that can change their properties, shape or appearance over time [the fourth dimension], or in response to some condition.