We study the spherical collapse model (SCM) in the framework of spatially flat power lawb gravity model. We find that the linear and non-linear growth of spherical overdensities of this particular f (T ) model are affected by the power-law parameter b. Finally, we compute the predicted number counts of virialized haloes in order to distinguish the current f (T ) model from the expectations of the concordance Λ cosmology. Specifically, the present analysis suggests that the f (T ) gravity model with positive (negative) b predicts more (less) virialized objects with respect to those of ΛCDM.
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