A flexible timepiece component for an oscillator mechanism or for a barrel of a horological movement, the component extending along a main plane and including at least a part made of a composite material, wherein the composite material comprises a matrix and a multitude of nanowires distributed in the matrix, the nanowires being juxtaposed, the matrix including a material for filling the interstices between the nanowires to join them to each other, each nanowire forming a solid one-piece tube, the nanowires being disposed substantially parallel to an axis substantially perpendicular to the main plane of the component.