Does it really never need a battery?

Yes. The Eco-Drive B612 movement charges from any light, natural or artificial, and stores the energy in a capacitor. In normal wear it keeps running without a battery change.

Is titanium weaker than stainless steel?

No. Super Titanium is hardened titanium, so it resists scratches well while weighing less than steel. The trade-off is a lighter feel on the wrist, not less durability.

It is rated to 100 m, which covers swimming, showering and snorkeling. It is not a dive watch, so leave it off for scuba diving.

How does it compare with the steel Nighthawk models?

The main differences are the titanium case and sapphire crystal here versus steel and mineral glass on many steel versions. The movement and 42 mm size are shared, so the choice comes down to weight and scratch resistance.

The watch on its titanium bracelet, a presentation box and the instruction manual. No charger is needed because it charges from light.

Does the chronograph measure long intervals?

It is a standard chronograph for timing short events like laps or cooking, not a long-duration timer. The subdials handle seconds and elapsed minutes.