|Stable release||3.1.3 / September 18, 2013|
|Preview release||3.2 Beta / November 27, 2013|
|Operating system||Mac OS X, Windows, Linux|
|Platform||iOS, Android, BlackBerry, Tizen|
|License||Apache Public License v2, Proprietary software|
Appcelerator Titanium is a platform for developing mobile, tablet and desktop applications using web technologies. Appcelerator Titanium is developed by Appcelerator Inc. and was introduced in December 2008.  Support for developing iPhone- and Android-based mobile applications was added in June 2009.  Support for developing iPad-based tablet apps was added in April 2010.  BlackBerry support was announced on June 2010,  and has been in beta since April 2013. Tizen support was also added in April 2013 with the 3.1.0 Titanium Studio and SDK releases.
In June 2011, Appcelerator released Studio and Titanium Mobile 1.7. Titanium Studio is a full open standards IDE that is derived from Aptana Studio which Appcelerator acquired in January 2011. In April 2010 Appcelerator expanded the Titanium product line with the Titanium Tablet SDK. The Titanium Tablet SDK draws heavily from the existing support for iPhone, but it also includes native support for iPad-only user interface controls such as split views and popovers. Initially the mobile SDK only supported development for iPad, but support now includes Android-based tablets as well.
Appcelerator, Inc. also offers cloud-based services for packaging, testing and distributing software applications developed on the Titanium platform. The company expanded its product line in January 2011 by acquiring Aptana, Inc, a developer of open source tools for building web applications.
On January 20, 2012, Titanium Desktop was discontinued and became a separate, community-driven project. It is also renamed to TideSDK.
The core features of Appcelerator Titanium include:
- A platform-independent API to access native UI components including navigation bars, menus, dialog boxes and alerts, and native device functionality including the file system, sound, network and local database.
- API access to native mobile functionality like geolocation, accelerometer and maps.
- Extensibility through open interfaces and licensing, allowing developers to introduce support for additional scripting languages, media codecs and device-specific functionality.
- Multiple phone web based application framework
- List of rich internet application frameworks
- "Appcelerator Raises $4.1 Million for Open Source RIA Platform". Techcrunch. 9 December 2008. Archived from the original on 2 November 2009. Retrieved 29 October 2009.
- "Appcelerator enables iPhone, Android app dev". InfoWorld. 8 June 2009. Archived from the original on 21 November 2009. Retrieved 29 October 2009.
- "Appcelerator Simplifies iPad App Development". 5 April 2010. Archived from the original on 7 April 2010. Retrieved 6 April 2010.
- "Appcelerator Takes On Adobe AIR with Titanium". eWeek. 9 December 2008. Retrieved 29 October 2009.
- Don Thorp (2011-09-07). "Platform Engineering: Android Runtime Performance Improvements". Appcelerator.
- "Why you should stay away from Appcelerator’s Titanium". 2 June 2011. Retrieved 27 November 2011.
- "A few months with Titanium Appcelerator". 2 July 2011. Retrieved 27 November 2011.
- "NBC iPad app now available". NBC. Retrieved 23 June 2011.
- "Why Titanium Appcelerator". Aaron Saunders, Clearly Innovative. Retrieved 28 December 2011.
- Perez, Sarah (14 June 2011). "Appcelerator Launches Titanium Studio: Mobile, Desktop & Web Development in One". ReadWriteWeb. Retrieved 14 June 2011.
- "Appcelerator Network Cloud Services". Appcelerator, Inc. Archived from the original on 27 October 2009. Retrieved 29 October 2009.
- "Appcelerator Acquires Web App Development Suite Aptana". TechCrunch. Retrieved 24 February 2011.
- Appcelerator Developer Blog - The Future of Titanium Desktop