Dozens of the state-of-the-art transit vehicles — which are built by the company's plant in Thunder Bay — were supposed to be rolling through Toronto by now, but only five are currently in service.
TTC chairman Josh Colle and CEO Andy Byford will be at the Bombardier plant.
Mayor John Tory said he's losing patience with the company and wants to send a tough message.
The TTC paid billions for 204 streetcars from Bombardier in 2009.
A strike at the company and problems with parts manufactured at Bombardier's Mexican plant have slowed production.
The company has said it can deliver all the streetcars by 2019.