Currently there is no way to associate a Ticket Workflow with a Ticket Template. However, you are able to associate a Task Template with a Ticket Template. Although this does not have the same functionality as a ticket workflow, it helps to associate a list of related work items with a ticket. In addition, each task can have a user or group marked as responsible.
I hope this helps clear everything up. If you find that task templates do not have the necessary functionality, I will create an enhancement request to add Workflow as a field on Ticket Templates. Please let us know if you would like further clarification or there is anything else we can do to assist you.