  Motivated by the geometrical interpretation of Brans-Dicke (BD) scalar field
which may also act as a torsion potential in Lyra geometry, we study the
effects of spacetime torsion on the dynamics of a collapsing massive star.
Taking the interior spacetime as the FLRW metric and the matter content as
spherically symmetric, homogeneous perfect fluid with the equation of state
(EoS) $p=w\rho$, we show that the collapse ends in a spacetime singularity
which is of the strong curvature type in the sense of Tipler. Whether the
trapped surfaces form during the dynamical evolution of the collapse depends on
the torsion parameter, related to the BD coupling parameter, and the EoS
subject to the conditions on physical reasonableness of the collapse
configuration. Hence, the space of torsion and EoS parameters is divided into
two portions, one for which the collapse process leads to the formation of
apparent horizon and the other for which the apparent horizon is failed to form
in the interior region. The nature of the singularity is examined from the
exterior perspective, by searching for the existence of radial null geodesics
reaching the faraway observers. Moreover, it is found that the effects of a
dynamical torsion can be transferred to the outside region of the collapsing
star, making the exterior region dynamic.
