AdoredTV made an entire video[0] to demonstrate this is absolutely baseless conjecture that NVIDIA Marketing tricked people into inferring.
It absolutely destroys the Titan idea, leaving no room for doubt.
I'm saying the only reason Nvidia didn't call it a Titan was because they knew it wasn't going to have an unassailable advantage over AMD.
A Nvidia card is Titan if it has the name and the drivers, and not if it doesn't.
RTX Titan for example was not as good in FP64 calculation compared to RTX Quadro. While first Titan was good at both. Nvidia kept changing what Titan means in order to extract most amount of money without hurting Quadro sales.
Even at its peak certain things were software limited for Titan, but not for Quadro. Nvidia has tons of artificial limitations for each of their graphics card once you go beyond gaming.
I also expect been a kind of struggle between their consumer side who need some other reason to sell their top end GPUs beyond just the whales when game developers aren't really that interested in pushing out features that will require it given the niche ownership, while the datacenter people want to protect their Quadro margins. This to me seems their most likely reason for the on-again/off-again relationship with pushing their high end cards for compute usage vs gaming usage.