diff --git a/examples/SpectralMethod/material.config b/examples/SpectralMethod/material.config
index 14437c5d8..978e0f511 100644
--- a/examples/SpectralMethod/material.config
+++ b/examples/SpectralMethod/material.config
@@ -52,22 +52,8 @@ n_slip                  20
 tau0_slip                 31e6 # per family
 tausat_slip               63e6 # per family
 a_slip                  2.25
-gdot0_twin              0.001
-n_twin                  20
-tau0_twin                 31e6 # per family
-s_pr                    0                        # push-up factor for slip saturation due to twinning
-twin_b                  0
-twin_c                  0
-twin_d                  0
-twin_e                  0
 h0_slipslip             75e6
-h0_sliptwin             0
-h0_twinslip             0
-h0_twintwin             0
 interaction_slipslip    1 1 1.4 1.4 1.4 1.4
-interaction_sliptwin    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-interaction_twinslip    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-interaction_twintwin    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 
 atol_resistance         1