A side-curtain airbag assembly includes a body structure including a roof rail and a pillar extending downwardly from the roof rail. The roof rail has an upwardly extending side portion and a first ramped surface extending inwardly from the side portion at a downward angle. An airbag is mounted to the side portion above the first ramped surface. A trim component is mounted to the pillar below the first ramped surface and has a face, a top, and a second ramped surface extending outwardly from the top at an upward angle towards the side portion. The first and second ramped surfaces are arranged to form a ramp that guides the airbag during deployment of the airbag. The first ramped surface has a higher yield strength than the second ramped surface.