Additive manufacturing has entered a new era with the rise of 4D printing, where time becomes the fourth design dimension. Moving beyond static 3D‑printed parts, 4D printing uses smart, stimuli‑responsive materials that transform in response to heat, light or chemistry. The result is active, self‑deploying structures such as medical implants that unfold inside the body, shifting AM from passive fabrication to programmable performance, with healthcare leading adoption.
In Mitasha Bharadwaj's recent article for TCT Magazine, she captures how AI is the real catalyst, solving the complex inverse design problem and slashing development times through generative design and predictive modelling. Crucially, Mitashsa also highlights the emerging IP challenges around how success in 4D printing now depends on protecting not just the printed object, but the materials, algorithms and time‑based behaviour that make it work.