Benchmark copper on the London Metal Exchange traded up 0.5pc at $6,000 a tonne in official rings. Prices of the metal used widely in the power and construction industries touched a six-month low at $5,740 in June.
"The deepening rift between the United States and China has been a headwind for metals. There needs to be a resolution to the trade dispute," said SP Angel analyst Sergey Raevskiy.
"But the Chinese are being careful, they have provided stimulus and will probably do more if necessary. There isn't much downside from here for copper."
TRADE: US Trade Representative Robert Lighthizer and senior US officials will travel to Shanghai next week to kick-start stalled negotiations aimed at ending a protracted trade war marked by tit-for-tat tariffs.
White House economic adviser Larry Kudlow on Tuesday said he expected China to start buying US agriculture products soon.
CHINA: Demand for base metals is highly correlated with manufacturing, which shrank in China last month.
China's central bank governor Yi Gang said current interest rates are appropriate, financial magazine Caixin reported on Tuesday.
China accounts for about half of global copper consumption estimated this year at about 24 million tonnes.
"We expect prices to remain subdued this summer," Citi analysts said in a note. "Further China easing should see prices start to move higher by the autumn, reaching around $6,600 a tonne by year-end."
Citi's base case is for a small copper market deficit this year.
"Inventory levels are moderately lower than their long-run average level," Citi analysts said. "However, the market is not expected to get tight enough to disconnect from global macroeconomic developments."
COPPER: Stocks of copper in LME-registered warehouses, at 295,000 tonnes, are significantly higher than in March, when levels were close to 111,000 tonnes.
Receding worry about copper supplies on the LME market can be seen in the wider discount for cash metal over the three-month contract . The discount was at $22 a tonne at Tuesday's close, against $2 a tonne on July 15.
TIN: Prices of the soldering metal hit three-year lows at $17,500 a tonne as funds added to short positions. It was untraded in the rings but bid 0.3pc lower at $17,620.
PRICES: Aluminium traded up 0.6pc at $1,827 a tonne, zinc climbed 1.1pc to $2,458 and lead was bid 1.5pc higher at $2,062.
Nickel was untraded. There were no bids and the offer was 2.2 pc higher at $14,480 a tonne.