The Two Faces of T-branes

<!--HTML-->T-branes are intrinsically non-Abelian brane configurations whose exotic features are not fully captured by geometry alone. The purpose of this talk is to give evidence for the existence of a brane-brane duality connecting T-branes to collections of ordinary Abelian branes, which encode the T-brane data in their non-trivial worldvolume curvature. The dual picture is argued to be reliable when the traditional description of T-branes in terms of Hitchin systems breaks down due to large field variations.