  In this work, we have studied the traversable wormholes geometry in $f(R)$
theory gravity, where $R$ be the Ricci scalar. The wormhole solution for some
assumed $f(R)$ functions have been presented. The assumption of $f(R)$ is based
on the fact that its behaviour changed with an assumed parameter $\alpha$
rather than the deceleration parameter. Three models are presented based on the
physically motivated shape function and their behaviours are studied.
