Can I have my agency's own domain with TTS Corporate?

Yes. 

To request your Own Domain go to "Settings" > Features & Services > Own Domain.

Fill in the requested details on the screen in order to request your domain. This will send an email to our support team that will start provision and will send you an email with details to follow through so make sure to check your email and whitelist TTS so our emails don't go to your spam box.