No, you can only sell your tickets through Relic.
Relic tickets are protected against unwanted resale, which is why they only exist in the Relic ecosystem. If you were able to download the tickets as PDF and sell them elsewhere, they could easily be used by scammers, which we want to prevent at all costs.
Share your tickets with friends
If you want to give away a ticket or start a group with other people who are also going to the event, you can share your tickets with your friends. Read more about sharing here.