USCG Documented vessels are exempt from titling with the State.
Non-motorized canoes, kayaks, punts, rowboats, or rubber rafts (regardless of length) when paddled, poled, or oared and sailboats under 14 feet in length when windblown. Adding an outboard or trolling motor to one of these types requires titling and registration.
Doesn't matter how you attach it. If it's motorized, it must be registered in Texas.
"Things turn out best for those who make the best of the way things turn out" - Zachary Troy Schrah - a young man with vision far beyond his years.