Recycled by Design - The Art of Recycling; Tim Gentry: Pleasure Spheres/Paul Matosic: Lost and Found, Woking, The Lightbox, Woking

3 March-10 May

Two temporary sculpture installations made from recycled, reclaimed or found objects are on show. The two artists also explore the use of natural and organic materials.

Constable Portraits: The Painter and his Circle, National Portrait Gallery, London

5 March-14 June

This exhibition is devoted to the portraits of John Constable (1776-1837), which are often overlooked. The English landscape painter produced about 100 portraits, which throw light on his relationships. Works are on loan from Tate, New York's Metropolitan Museum of Art, and the Victoria and Albert Museum.

Titanic Honour and Glory, National Maritime Museum Cornwall, Falmouth

6 March-21 June

Devoted to the most famous ship in history, this exhibition features artefacts recovered from the ocean liner. These include a silver pocket watch that stopped working at 02.28, the moment the Titanic sank. Props and costumes from the 1997 blockbuster film are also on display, including Kate Winslet's dress.

Living Apart, Aberystwyth Arts Centre

7 March-25 April

Photojournalist Ian Berry traces the history of apartheid in South Africa. The Magnum photographer captures key moments in the country's development, such as the election of Nelson Mandela. Berry was the only photographer to document the Sharpeville Massacre,
in 1960, when more than 50 people were killed after police opened fire on a peaceful protest.

The Big Bug Show, Museums Sheffield: Weston Park

7 March-spring 2010

This creepy-crawly extravaganza includes the film Microcosmos, which captures the everyday activities of insects as they fight, eat and reproduce. Live insects are on view, while an interactive display enables visitors to create a "super-powered bug".

The Quiet Men, PM Gallery, Ealing

11 March-18 April

Five artists, including Brian Whelan, Dermot Holland and John Duffin, reflect on their experiences in London as immigrants, or children of immigrants, from Ireland. Churches, working men's clubs, skyscrapers, buses and trains are vividly depicted in the paintings and etchings.

Turner and Italy, National Gallery of Scotland, Edinburgh

27 March-7 June

More than 100 paintings, watercolours and sketches reflect JMW Turner's fascination with Italy. Important pieces on show will include Rome from the Vatican (1819), a panorama of the capital that shows Raphael painting in the foreground, and Approach to Venice (1844), which is on loan from the National Gallery of Art in P15Washington, DC.