  This paper is devoted to compute the weak deflection angle for Kalb-Ramond
traversable wormhole solution in plasma and dark matter mediums by using the
method of Gibbons and Werner. To acquire our results, we evaluate Gaussian
optical curvature by utilizing the Gauss-Bonnet theorem in the weak field
limits. We also investigate the graphical influence of deflection angle
$\tilde{\alpha}$ with respect to the impact parameter $\sigma$ and minimal
radius $r_0$ in plasma medium. Moreover, we derive the deflection angle by
using different method known as Keeton and Petters method. We also examine that
if we remove the effects of plasma and dark matter, the results become
identical to that of non-plasma case.
