Takkar ka Rishta means complimentary; a marriage based on equality, not on one person dominating the other. Instead, both partners should have an equal say in all important decisions.
What Tia does not have with Shivaay. Shivaay doesn't care about her opinions, only dismisses them, his own take priority in his life.
But with Anika, she gives him back as good as she gets, there is full commitment between these two, even in every argument they have, in every interaction they have.
A relationship of equality.