The HTC Titan (also known as the HTC Eternity and marketed as HTC TITAN), is a smartphone running the Windows Phone OS 7.5 (codename Mango) operating system. The phone was designed and manufactured by HTC Corporation. It is the successor to the HTC HD7.

HTC announced the HTC Titan on September 1, 2011 in London. It has a 4.7 inch S-LCD screen making it the largest available on any Windows Phone. The HTC Titan also has a 1.5GHz processor with 512MB RAM and 16GB internal memory.

On 9 January 2012, the successor to the Titan, the Titan II, was announced as the first Windows Phone handset with LTE. The Titan II is similar to the Titan, with the major changes being LTE enabled and improving the camera to 16 megapixels.

At the phone dialer, dial ##3282# then press the "Call" button

The phone has been well received by reviewers. It has been called the flagship Windows phone by multiple reviewers. It is seen as a phone that could inspire users to switch to Windows phone from Android and iPhone.

Some users have been reported poor call quality when using the Titan, but this issue has not been confirmed for all units.

HTC Corporation (Chinese: 宏達國際電子股份有限公司; pinyin: Hóngdá Guójì Diànzǐ Gǔfèn Yǒuxiàn Gōngsī) (TWSE: 2498), formerly High Tech Computer Corporation, is a Taiwanese manufacturer of smartphones and tablets. The company initially made smartphones based mostly on Microsoft's Windows Mobile operating system (OS) software, but in 2009 it began to shift its core focus away from Windows Mobile devices to devices based on Android OS, and in 2010 to Windows Phone OS as well.

HTC is also a member of the Open Handset Alliance, a group of handset manufacturers and mobile network operators dedicated to the advancement of the Android mobile device platform. The HTC Dream, marketed by T-Mobile in many countries as the T-Mobile G1 or Era G1 in Poland, was the first phone on the market to use the Android mobile device platform.

HTC was founded in 1997 by Cher Wang, HT Cho, and Peter Chou. Initially a manufacturer of notebook computers, HTC began designing some of the world's first touch and wireless hand-held devices in 1998. The company has a rich heritage of many "firsts", including creating the first Microsoft-powered smartphone (2002) and the first Microsoft 3G phone (2005). Their first major product was made in 2000 and was one of the world's first touch screen smartphones. The Palm Treo 650 and the iPAQ were created by HTC. They started producing 3G-capable phones in early 2005 and made the world's first Android phone in 2008, the HTC Dream (also marketed as the T-Mobile G1). It was first released in the United States for pre-order through T-Mobile USA on September 23, 2008, and became available in U.S. T-Mobile stores on October 22, 2008. The G1 was available in the UK several days after its USA launch, and has since been introduced in many countries including Australia and Singapore. In 2009, the company launched the HTC Sense interface for the platform with the HTC Hero.

Titan most often refers to:

*Titan (Imperial Guard), a member of the Shi'ar Imperial Guards in the Marvel Universe