An example technique may include depositing, on or adjacent a substrate, a first volume of a polymeric material using an additive manufacturing technique. The first volume of the polymeric material has a first degree of polymer orientation associated with a first deposition rate and a first temperature. The example technique may include depositing, on or adjacent the substrate or the first volume of material, at least one second volume of the polymeric material. The second volume of the polymeric material has a second degree of polymer orientation associated with a second deposition rate and a second temperature. The first volume and the second volume are configured to respond to a shape change stimulus by exhibiting a respective first change in dimension and a second change in dimension. The first change in dimension is different from the second change in dimension by a predetermined threshold.