由于钛阳极棒，我的热水中会残留钛吗？
no. since titanium powered anodes are stable, there is no metallic leaching in the concerned environment and therefore no residual pollution.
it is important to change the sacrificial anode in your rv every year for a steel water heater. aluminium tanks are generally not equipped with replaceable anodes because they have an inner coating of zinc and aluminium with the same protective function.