Along with wider research programmes, TWI Ltd works directly with industrial member companies through single client projects to provide bespoke solutions.

TWI has several facilities both in the UK and overseas: The organisation has international branches in Australia, Bahrain, Canada, India, Indonesia, Malaysia, Pakistan, Thailand, Turkey, and the United Arab Emirates.

This was important to the later creation of TWI Ltd as it took the scope of the Institute beyond personal professional membership to also include industrial member companies in order to further support research activities.

In 1946 the BWRA bought Abington Hall, near Cambridge, UK, a country house and grounds in poor repair, for £3850 and commenced business under Allan Ramsay Moon as its director of research.

The first welding shop was established in stables adjoining the house, and fatigue research commenced under Dr. Richard Weck.

BWRA also occupied a house in London, 29 Park Crescent, which it converted into a metallurgical laboratory, with the butler's pantry becoming the polishing room and the coachman's quarters, the machine shop.

Ramsay Moon left after one year, disillusioned at the grant of only £30,000 from DSIR, and it fell to Dr. Harry Taylor to grow the organisation into a viable business.

The coat of arms depicts a joint being made through the application of heat with a Latin motto that translates as ‘out of two, one.’ Meanwhile, The Institute of Welding had bought property in London very close to the Imperial College of Science and Technology.

The scessor to DSIR, the Ministry of Technology, put forward no objection so a merger was agreed and a new body – The Welding Institute – was created on 28 March 1968.

By 2008, the organisation had opened offices and laboratories at three further sites within the UK (in Middlesbrough, Port Talbot and the Advanced Manufacturing Park, South Yorkshire) and operated facilities in the North America, China, Southeast Asia, India and the Middle East.