Methods and apparatus for robotic induction in materials handling facilities with batch singulation inventory areas are disclosed. A control system directs the one or more robotic devices to transport a particular portable storage unit of a plurality of portable storage units to and from a particular induction station of one or more induction stations. The control system directs induction of one or more single units of items from one or more locations of the portable storage unit, while the particular portable storage unit is located at an induction station, into the conveyance mechanism at the particular induction station. The control system directs picks of batches of heterogeneous items from a separate inventory storage area. The control system directs induction of single units of items from the batches of heterogeneous items picked from the separate inventory storage area into the conveyance mechanism at a batch singulation station.