The Taiwanese handset maker, which has thrown its weight behind the Google Android operating system, unveiled two more devices based on the platform, as well as a compact device running the Windows mobile operating system.
The HTC Legend is similar in shape to another HTC device, the Hero, but the Legend is made from a single piece of aluminium, without any joins.
It's the same kind of manufacturing process used by Apple to make its unibody Mac computers.
The Legend has a 3.2in AMOLED screen, which produces pin-sharp images and bright, crisp colours, and combines a touch-screen interface with an optical trackpad for easier menu navigation.
Another Android-based device, the HTC Desire, is almost identical to Google's Nexus One handset, and boasts a 3.7in AMOLED screen.
It's powered by a slick 1GHz Snapdragon processor, which means it can switch between programs, applications and tasks more quickly, and supports Flash, the technical standard that makes it possible to view certain animated webpages and embedded videos when surfing the mobile web.
In addition, HTC also showed off the HD Mini, a smaller version of the popular, Windows-powered HD2.
John Wang, chief marketing officer at HTC, said the device had exactly the same look and feel as the HD2, but in a more compact form factor.
It can also act as a "wireless hotspot", allowing other devices, such as laptops, to share its 3G data connection to get online.
HTC said it had also improved its Sense user interface, which sits on top of the Android operating system and collates contacts in to one central address book, allowing users to contact them in a variety of ways - such as by email, text message or through Facebook - with a single click.
The new version of Sense adds the Friend Stream widget to the handset, which aggregates a user's social communication, from sites such as Facebook, Twitter and Flickr, in to a single flow of updates.
Users can also group contacts depending on whether they are close friends, family or work colleagues, allowing separate out real-time information across their wider social circle.
“At its essence, the mobile phone is the most personal item you have in your possession," said Peter Chou, chief executive of HTC. "HTC Sense was created to magnify your ability to create and define your own unique mobile experience."
The latest version of Sense will be available on the HTC Legend and HTC Desire, and will be offered as a free software update to existing HTC Hero users.
The Legend and the HD Mini will be available in April, with the Desire going on sale in the summer.
Telegraph Media Group Limited