Yeah, kinda, sorta, but not really. They've manipulated the additive manufacturing process to change the structure and promote precipitation of fine nickel-titanium in layers. I would consider it more along the lines of internal case hardening or differential heat treat, but on a very fine scale, than the actual differential layering of different steels. They produce layers of different compositions/properties, but from the same materials.
https://www.nature.com/articles/s41586-020-2409-3
https://arstechnica.com/science/2020/06/can-you-3d-print-damascus-steel-pretty-much-yeah/
Traditional folded steels combined two steels that varied by carbon content and in their microscale structure, which is controlled by how quickly it cools (by quenching). In this case, the researchers were using a nickel-titanium-iron alloy steel that works well with these 3D printing techniques, in which metal powder is fed onto the work surface and heated with a laser.
https://www.nature.com/articles/s41586-020-2409-3
https://arstechnica.com/science/2020/06/can-you-3d-print-damascus-steel-pretty-much-yeah/
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