Titus Andronicus is considered a "revenge tragedy," a genre that was made popular in the 16th century by Thomas Kyd (Spanish Tragedy) and John Webster (White Devil). As such, it features a seemingly endless cycle of bloody vengeance that nearly destroys Rome and takes down the city's most important political figures. While the play seems to take grisly pleasure in its over-the-top acts of vengeance, it also suggests that revenge reduces everyone to the status of wild animals. (For more on Titus Andronicus as a revenge tragedy, see "Genre.")
Vengeance turns human beings into predatory animals in Titus Andronicus.
Shakespeare is mocking the genre of the revenge tragedy in this play.